# MATH110/April 2017/Question 11 (c)

From User talk:AiliShao

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Hi Aili,

Can you add the explanation on the relation between extreme values and f'(x)=0?

Also, I guess some students have difficulty in plotting and accurately in the exam. So, they might not recognize that it is only intersect at once.

How about adding alternative way to show that there's only one x satisfying ? (I guess we can use everywhere. )

HyunjuKwon (talk)