Lecture notes proof verification - Intermediate Value Theorem












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In the model proof below for the Intermediate Value Theorem it is written that $L_p={yin[a,b]quadtext{such that}quad f(y)lt{q}}$. Then $cin{L_q}$ but $dnotin{L_q}$. Shouldn't it be that $ain{L_q}$ but $bnotin{L_q}$ because $L_qsubseteq{[a,b]}$ and not $L_qsubseteq{[c,d]}$? I keep picking up on parts of my lecture notes that seem wrong to me.



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    In the model proof below for the Intermediate Value Theorem it is written that $L_p={yin[a,b]quadtext{such that}quad f(y)lt{q}}$. Then $cin{L_q}$ but $dnotin{L_q}$. Shouldn't it be that $ain{L_q}$ but $bnotin{L_q}$ because $L_qsubseteq{[a,b]}$ and not $L_qsubseteq{[c,d]}$? I keep picking up on parts of my lecture notes that seem wrong to me.



    enter image description here










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      $begingroup$


      In the model proof below for the Intermediate Value Theorem it is written that $L_p={yin[a,b]quadtext{such that}quad f(y)lt{q}}$. Then $cin{L_q}$ but $dnotin{L_q}$. Shouldn't it be that $ain{L_q}$ but $bnotin{L_q}$ because $L_qsubseteq{[a,b]}$ and not $L_qsubseteq{[c,d]}$? I keep picking up on parts of my lecture notes that seem wrong to me.



      enter image description here










      share|cite|improve this question









      $endgroup$




      In the model proof below for the Intermediate Value Theorem it is written that $L_p={yin[a,b]quadtext{such that}quad f(y)lt{q}}$. Then $cin{L_q}$ but $dnotin{L_q}$. Shouldn't it be that $ain{L_q}$ but $bnotin{L_q}$ because $L_qsubseteq{[a,b]}$ and not $L_qsubseteq{[c,d]}$? I keep picking up on parts of my lecture notes that seem wrong to me.



      enter image description here







      proof-verification






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      asked Jan 30 at 16:52







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          Yes i mean this is probably a typo. $L_q$ is in the domain, but c and d are in the range. You are 100% correct.






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            $begingroup$

            Yes i mean this is probably a typo. $L_q$ is in the domain, but c and d are in the range. You are 100% correct.






            share|cite|improve this answer









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              $begingroup$

              Yes i mean this is probably a typo. $L_q$ is in the domain, but c and d are in the range. You are 100% correct.






              share|cite|improve this answer









              $endgroup$
















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                $begingroup$

                Yes i mean this is probably a typo. $L_q$ is in the domain, but c and d are in the range. You are 100% correct.






                share|cite|improve this answer









                $endgroup$



                Yes i mean this is probably a typo. $L_q$ is in the domain, but c and d are in the range. You are 100% correct.







                share|cite|improve this answer












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                answered Jan 30 at 17:08









                Marat AlievMarat Aliev

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