$(frac{3}{2})^h = log_{3/2} h = log_{2} h / log_{2} 3/2$












0












$begingroup$


$(frac{3}{2})^h$, then take the log of it: $log_{3/2} h = log_{2} h / log_{2} 3/2$



could someone explain steps please.



I thought $(3/2)^h$ would be $hlog (3/2)$



nor do I get how they got to this $log_{3/2} h = log_{2} h / log_{2} 3/2$



Which property are they optimizing?










share|cite|improve this question











$endgroup$












  • $begingroup$
    For me also, the first line doesn't seem to make sense. Also, what is $n$? Where does this come from?
    $endgroup$
    – John Omielan
    Feb 2 at 2:10










  • $begingroup$
    n should be h - whoops
    $endgroup$
    – Bas bas
    Feb 2 at 2:12










  • $begingroup$
    Thanks for the feedback & update of the question text. You should also update the title, including removing the first "=" as that is not true. In addition, please let us know where the first line comes from. Thanks.
    $endgroup$
    – John Omielan
    Feb 2 at 2:13












  • $begingroup$
    This question makes no sense. What exactly are you asking? What is the context?
    $endgroup$
    – Zubin Mukerjee
    Feb 2 at 2:22










  • $begingroup$
    How does $log_{3/2} h = log_{2} h / log_{2} 3/2$. What properties are used?
    $endgroup$
    – Bas bas
    Feb 2 at 2:24


















0












$begingroup$


$(frac{3}{2})^h$, then take the log of it: $log_{3/2} h = log_{2} h / log_{2} 3/2$



could someone explain steps please.



I thought $(3/2)^h$ would be $hlog (3/2)$



nor do I get how they got to this $log_{3/2} h = log_{2} h / log_{2} 3/2$



Which property are they optimizing?










share|cite|improve this question











$endgroup$












  • $begingroup$
    For me also, the first line doesn't seem to make sense. Also, what is $n$? Where does this come from?
    $endgroup$
    – John Omielan
    Feb 2 at 2:10










  • $begingroup$
    n should be h - whoops
    $endgroup$
    – Bas bas
    Feb 2 at 2:12










  • $begingroup$
    Thanks for the feedback & update of the question text. You should also update the title, including removing the first "=" as that is not true. In addition, please let us know where the first line comes from. Thanks.
    $endgroup$
    – John Omielan
    Feb 2 at 2:13












  • $begingroup$
    This question makes no sense. What exactly are you asking? What is the context?
    $endgroup$
    – Zubin Mukerjee
    Feb 2 at 2:22










  • $begingroup$
    How does $log_{3/2} h = log_{2} h / log_{2} 3/2$. What properties are used?
    $endgroup$
    – Bas bas
    Feb 2 at 2:24
















0












0








0





$begingroup$


$(frac{3}{2})^h$, then take the log of it: $log_{3/2} h = log_{2} h / log_{2} 3/2$



could someone explain steps please.



I thought $(3/2)^h$ would be $hlog (3/2)$



nor do I get how they got to this $log_{3/2} h = log_{2} h / log_{2} 3/2$



Which property are they optimizing?










share|cite|improve this question











$endgroup$




$(frac{3}{2})^h$, then take the log of it: $log_{3/2} h = log_{2} h / log_{2} 3/2$



could someone explain steps please.



I thought $(3/2)^h$ would be $hlog (3/2)$



nor do I get how they got to this $log_{3/2} h = log_{2} h / log_{2} 3/2$



Which property are they optimizing?







algebra-precalculus






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Feb 2 at 2:25







Bas bas

















asked Feb 2 at 2:03









Bas basBas bas

49512




49512












  • $begingroup$
    For me also, the first line doesn't seem to make sense. Also, what is $n$? Where does this come from?
    $endgroup$
    – John Omielan
    Feb 2 at 2:10










  • $begingroup$
    n should be h - whoops
    $endgroup$
    – Bas bas
    Feb 2 at 2:12










  • $begingroup$
    Thanks for the feedback & update of the question text. You should also update the title, including removing the first "=" as that is not true. In addition, please let us know where the first line comes from. Thanks.
    $endgroup$
    – John Omielan
    Feb 2 at 2:13












  • $begingroup$
    This question makes no sense. What exactly are you asking? What is the context?
    $endgroup$
    – Zubin Mukerjee
    Feb 2 at 2:22










  • $begingroup$
    How does $log_{3/2} h = log_{2} h / log_{2} 3/2$. What properties are used?
    $endgroup$
    – Bas bas
    Feb 2 at 2:24




















  • $begingroup$
    For me also, the first line doesn't seem to make sense. Also, what is $n$? Where does this come from?
    $endgroup$
    – John Omielan
    Feb 2 at 2:10










  • $begingroup$
    n should be h - whoops
    $endgroup$
    – Bas bas
    Feb 2 at 2:12










  • $begingroup$
    Thanks for the feedback & update of the question text. You should also update the title, including removing the first "=" as that is not true. In addition, please let us know where the first line comes from. Thanks.
    $endgroup$
    – John Omielan
    Feb 2 at 2:13












  • $begingroup$
    This question makes no sense. What exactly are you asking? What is the context?
    $endgroup$
    – Zubin Mukerjee
    Feb 2 at 2:22










  • $begingroup$
    How does $log_{3/2} h = log_{2} h / log_{2} 3/2$. What properties are used?
    $endgroup$
    – Bas bas
    Feb 2 at 2:24


















$begingroup$
For me also, the first line doesn't seem to make sense. Also, what is $n$? Where does this come from?
$endgroup$
– John Omielan
Feb 2 at 2:10




$begingroup$
For me also, the first line doesn't seem to make sense. Also, what is $n$? Where does this come from?
$endgroup$
– John Omielan
Feb 2 at 2:10












$begingroup$
n should be h - whoops
$endgroup$
– Bas bas
Feb 2 at 2:12




$begingroup$
n should be h - whoops
$endgroup$
– Bas bas
Feb 2 at 2:12












$begingroup$
Thanks for the feedback & update of the question text. You should also update the title, including removing the first "=" as that is not true. In addition, please let us know where the first line comes from. Thanks.
$endgroup$
– John Omielan
Feb 2 at 2:13






$begingroup$
Thanks for the feedback & update of the question text. You should also update the title, including removing the first "=" as that is not true. In addition, please let us know where the first line comes from. Thanks.
$endgroup$
– John Omielan
Feb 2 at 2:13














$begingroup$
This question makes no sense. What exactly are you asking? What is the context?
$endgroup$
– Zubin Mukerjee
Feb 2 at 2:22




$begingroup$
This question makes no sense. What exactly are you asking? What is the context?
$endgroup$
– Zubin Mukerjee
Feb 2 at 2:22












$begingroup$
How does $log_{3/2} h = log_{2} h / log_{2} 3/2$. What properties are used?
$endgroup$
– Bas bas
Feb 2 at 2:24






$begingroup$
How does $log_{3/2} h = log_{2} h / log_{2} 3/2$. What properties are used?
$endgroup$
– Bas bas
Feb 2 at 2:24












1 Answer
1






active

oldest

votes


















1












$begingroup$

If you take the (natural) log of $left(frac{3}{2}right)^h$, then it is indeed $hlogleft(frac{3}{2}right)$.



It appears that whatever source you got this from attempted to take the log base $frac{3}{2}$ of $left(frac{3}{2}right)^h$. But this would be $log_{3/2}left(left(frac{3}{2}right)^hright)=hlog_{3/2}left(frac{3}{2}right)=h$, not $log_{3/2}(h)$.



One rule of logarithms is that $log_a(b) = frac{log_c(b)}{log_c(a)}$ (this is the change of base formula). Applying this with $a=frac{3}{2}$, $b=h$, and $c=2$, we do indeed have $log_{3/2}(h) = log_2(h)/log_2(3/2)$.



In conclusion,





  • $logleft(left(frac{3}{2}right)^hright)neq log_{3/2}(h)$ (in any base)


  • $log_{3/2}(h) = log_2(h)/log_2(3/2)$ by the change of base formula.






share|cite|improve this answer









$endgroup$













  • $begingroup$
    As such, it seems the $log_{3/2}{left(hright)} = log_{2}{left(hright)} / log_{2}{left(3/2right)}$ equation is true for any positive $h$. Thus, it doesn't really have anything directly to do with the original value of $left(frac{3}{2}right)^h$.
    $endgroup$
    – John Omielan
    Feb 2 at 2:31












  • $begingroup$
    That is correct, the value of $h$ is irrelevant (well, it has to be positive to take the log of it, but that's it).
    $endgroup$
    – kccu
    Feb 2 at 2:32














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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

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active

oldest

votes






active

oldest

votes









1












$begingroup$

If you take the (natural) log of $left(frac{3}{2}right)^h$, then it is indeed $hlogleft(frac{3}{2}right)$.



It appears that whatever source you got this from attempted to take the log base $frac{3}{2}$ of $left(frac{3}{2}right)^h$. But this would be $log_{3/2}left(left(frac{3}{2}right)^hright)=hlog_{3/2}left(frac{3}{2}right)=h$, not $log_{3/2}(h)$.



One rule of logarithms is that $log_a(b) = frac{log_c(b)}{log_c(a)}$ (this is the change of base formula). Applying this with $a=frac{3}{2}$, $b=h$, and $c=2$, we do indeed have $log_{3/2}(h) = log_2(h)/log_2(3/2)$.



In conclusion,





  • $logleft(left(frac{3}{2}right)^hright)neq log_{3/2}(h)$ (in any base)


  • $log_{3/2}(h) = log_2(h)/log_2(3/2)$ by the change of base formula.






share|cite|improve this answer









$endgroup$













  • $begingroup$
    As such, it seems the $log_{3/2}{left(hright)} = log_{2}{left(hright)} / log_{2}{left(3/2right)}$ equation is true for any positive $h$. Thus, it doesn't really have anything directly to do with the original value of $left(frac{3}{2}right)^h$.
    $endgroup$
    – John Omielan
    Feb 2 at 2:31












  • $begingroup$
    That is correct, the value of $h$ is irrelevant (well, it has to be positive to take the log of it, but that's it).
    $endgroup$
    – kccu
    Feb 2 at 2:32


















1












$begingroup$

If you take the (natural) log of $left(frac{3}{2}right)^h$, then it is indeed $hlogleft(frac{3}{2}right)$.



It appears that whatever source you got this from attempted to take the log base $frac{3}{2}$ of $left(frac{3}{2}right)^h$. But this would be $log_{3/2}left(left(frac{3}{2}right)^hright)=hlog_{3/2}left(frac{3}{2}right)=h$, not $log_{3/2}(h)$.



One rule of logarithms is that $log_a(b) = frac{log_c(b)}{log_c(a)}$ (this is the change of base formula). Applying this with $a=frac{3}{2}$, $b=h$, and $c=2$, we do indeed have $log_{3/2}(h) = log_2(h)/log_2(3/2)$.



In conclusion,





  • $logleft(left(frac{3}{2}right)^hright)neq log_{3/2}(h)$ (in any base)


  • $log_{3/2}(h) = log_2(h)/log_2(3/2)$ by the change of base formula.






share|cite|improve this answer









$endgroup$













  • $begingroup$
    As such, it seems the $log_{3/2}{left(hright)} = log_{2}{left(hright)} / log_{2}{left(3/2right)}$ equation is true for any positive $h$. Thus, it doesn't really have anything directly to do with the original value of $left(frac{3}{2}right)^h$.
    $endgroup$
    – John Omielan
    Feb 2 at 2:31












  • $begingroup$
    That is correct, the value of $h$ is irrelevant (well, it has to be positive to take the log of it, but that's it).
    $endgroup$
    – kccu
    Feb 2 at 2:32
















1












1








1





$begingroup$

If you take the (natural) log of $left(frac{3}{2}right)^h$, then it is indeed $hlogleft(frac{3}{2}right)$.



It appears that whatever source you got this from attempted to take the log base $frac{3}{2}$ of $left(frac{3}{2}right)^h$. But this would be $log_{3/2}left(left(frac{3}{2}right)^hright)=hlog_{3/2}left(frac{3}{2}right)=h$, not $log_{3/2}(h)$.



One rule of logarithms is that $log_a(b) = frac{log_c(b)}{log_c(a)}$ (this is the change of base formula). Applying this with $a=frac{3}{2}$, $b=h$, and $c=2$, we do indeed have $log_{3/2}(h) = log_2(h)/log_2(3/2)$.



In conclusion,





  • $logleft(left(frac{3}{2}right)^hright)neq log_{3/2}(h)$ (in any base)


  • $log_{3/2}(h) = log_2(h)/log_2(3/2)$ by the change of base formula.






share|cite|improve this answer









$endgroup$



If you take the (natural) log of $left(frac{3}{2}right)^h$, then it is indeed $hlogleft(frac{3}{2}right)$.



It appears that whatever source you got this from attempted to take the log base $frac{3}{2}$ of $left(frac{3}{2}right)^h$. But this would be $log_{3/2}left(left(frac{3}{2}right)^hright)=hlog_{3/2}left(frac{3}{2}right)=h$, not $log_{3/2}(h)$.



One rule of logarithms is that $log_a(b) = frac{log_c(b)}{log_c(a)}$ (this is the change of base formula). Applying this with $a=frac{3}{2}$, $b=h$, and $c=2$, we do indeed have $log_{3/2}(h) = log_2(h)/log_2(3/2)$.



In conclusion,





  • $logleft(left(frac{3}{2}right)^hright)neq log_{3/2}(h)$ (in any base)


  • $log_{3/2}(h) = log_2(h)/log_2(3/2)$ by the change of base formula.







share|cite|improve this answer












share|cite|improve this answer



share|cite|improve this answer










answered Feb 2 at 2:25









kccukccu

11.2k11231




11.2k11231












  • $begingroup$
    As such, it seems the $log_{3/2}{left(hright)} = log_{2}{left(hright)} / log_{2}{left(3/2right)}$ equation is true for any positive $h$. Thus, it doesn't really have anything directly to do with the original value of $left(frac{3}{2}right)^h$.
    $endgroup$
    – John Omielan
    Feb 2 at 2:31












  • $begingroup$
    That is correct, the value of $h$ is irrelevant (well, it has to be positive to take the log of it, but that's it).
    $endgroup$
    – kccu
    Feb 2 at 2:32




















  • $begingroup$
    As such, it seems the $log_{3/2}{left(hright)} = log_{2}{left(hright)} / log_{2}{left(3/2right)}$ equation is true for any positive $h$. Thus, it doesn't really have anything directly to do with the original value of $left(frac{3}{2}right)^h$.
    $endgroup$
    – John Omielan
    Feb 2 at 2:31












  • $begingroup$
    That is correct, the value of $h$ is irrelevant (well, it has to be positive to take the log of it, but that's it).
    $endgroup$
    – kccu
    Feb 2 at 2:32


















$begingroup$
As such, it seems the $log_{3/2}{left(hright)} = log_{2}{left(hright)} / log_{2}{left(3/2right)}$ equation is true for any positive $h$. Thus, it doesn't really have anything directly to do with the original value of $left(frac{3}{2}right)^h$.
$endgroup$
– John Omielan
Feb 2 at 2:31






$begingroup$
As such, it seems the $log_{3/2}{left(hright)} = log_{2}{left(hright)} / log_{2}{left(3/2right)}$ equation is true for any positive $h$. Thus, it doesn't really have anything directly to do with the original value of $left(frac{3}{2}right)^h$.
$endgroup$
– John Omielan
Feb 2 at 2:31














$begingroup$
That is correct, the value of $h$ is irrelevant (well, it has to be positive to take the log of it, but that's it).
$endgroup$
– kccu
Feb 2 at 2:32






$begingroup$
That is correct, the value of $h$ is irrelevant (well, it has to be positive to take the log of it, but that's it).
$endgroup$
– kccu
Feb 2 at 2:32




















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