For the function f(x) = x2 – 6x + 8, 2 < x < 4 , the value of x for which f'(x) vanishes is

 

what does the meaning of the vanishes is plz can u tell me me what is meaning of question

Dear vikash,

f(x) = x2 – 6x + 8, 2 < x < 4

f'(x)=2x-6

Here vanishes means that it goes to zero.

f'(x)=0 means that x=3

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