Q. 85.0( 2 Votes )
Prove that the fu
Consider ƒ(x)=loga x
domain of f(x) is x>0
⇒ for a>1, ln(a)>0,
hence f’(x) >0 which means strictly increasing.
⇒ for 0<a<1, ln(a)<0,
hence f’(x)<0 which means strictly decreasing.
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