Q. 4 B 4.0( 4 Votes )

Prove that the following functions do not have maxima or minima:

g(x) = log x

Answer :

g(x) = logx

Since, log x is defined for a positive number x,

g’(x) > 0 for any x.

Therefore, there does not exist c ϵ R such that f’(c) = 0

Hence, function f does not have maxima or minima.

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RS Aggarwal - Mathematics