Q. 77
Mark (√) against the correct answer in the following:
is increasing in
A. (0, ∞)
B. (-∞, 0)
C. (1, 3)
D. 
Answer :
⇒ f(x)=[x(x-3)]2
⇒ f' (x)=2[x(x-3)] =0
When x> 3/2 the function is increasing
X<3 function is increasing.
⇒ 
Function is increasing.
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