Hello Vikrant
We first find f'(x).
If f'(x) > 0, then it is strictly increasing
If f'(x) < 0, then it is strictly decreasing.
Try doing the chapter by concept wise. https://www.teachoo.com/subjects/cbse-maths/class-12th/ch6-12th-application-of-derivatives/
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Written on Feb. 12, 2018, midnight