Mark the correct alternative in the following:

Function f(x) = log_{a} x is increasing on R, if

Formula:- (i) The necessary and sufficient condition for differentiable function defined on (a,b) to be strictly increasing on (a, b) is that f’(x)>0 for all x(a,b)

f(x) = log_{a} x

For increasing f’(x)>0

For log a>1

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