Q. 133.5( 2 Votes )

Mark the correct A. monotonically increasing

B. monotonically decreasing

C. not monotonic

D. constant

Answer :

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


Given:-


f(x)=2(x-1)+3(2-x)


f(x)=-x+4



Therefore f’(x) <0


Hence decreasing function

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