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alamps3 · 03-06-2008, 10:17 PM

I'm sure most people have downloaded the practice book so please refer to it for my question. in #34, the one about limits of f and f', the answer is a, but why is b also not a correct answer? In fact, if a is the answer, doesn't b also HAVE to be true as well? can some show me a function that proves that b must not also be true? Thanks.

lime · 03-09-2008, 01:02 AM

It can be any function that does not have the second derivative.

alamps3 · 03-15-2008, 01:33 AM

oh yeah. i knew it had to be something simple seeing that a high percentage answered it correctly. thanks

03-06-2008, 10:17 PM	#1 (permalink)
alamps3 Trying to make mom and pop proud Join Date: Mar 2008 Posts: 12	#34 in the practice book I'm sure most people have downloaded the practice book so please refer to it for my question. in #34, the one about limits of f and f', the answer is a, but why is b also not a correct answer? In fact, if a is the answer, doesn't b also HAVE to be true as well? can some show me a function that proves that b must not also be true? Thanks.

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03-09-2008, 01:02 AM	#2 (permalink)
lime Eager! Join Date: Nov 2007 Location: Russia Posts: 54	It can be any function that does not have the second derivative.

03-15-2008, 01:33 AM	#3 (permalink)
alamps3 Trying to make mom and pop proud Join Date: Mar 2008 Posts: 12	oh yeah. i knew it had to be something simple seeing that a high percentage answered it correctly. thanks

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