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Q.If f(x)=x3+3x2−9x+7f(x) = x^3 + 3x^2 - 9x + 7, then f(x)f(x) is increasing in

a
(−∞,−3)(-\infty, -3)
b
(−3,∞)(-3, \infty)
c
(−∞,−3]∪[3,∞)(-\infty, -3] \cup [3, \infty)
d
(−3,3)(-3,3)

Correct Answer: Option B

The correct solution involves applying the fundamental concept to derive the final value step by step...

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