If \[f'(x)\]is zero in the interval (a, b) then in this interval it is

1.	If \[f'(x)\]is zero in the interval (a, b) then in this interval it is
A.	Increasing function
B.	Decreasing function
C.	Only for a > 0 and b>0 is increasing function
D.	None of these
Answer» E.

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If \[f'(x)\]is zero in the interval (a, b) then in this interval it is

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