Solve this following

Question:

Find the intervals on which the function $f(\mathrm{x})=2 \mathrm{x}^{3}-3 \mathrm{x}^{2}-36 \mathrm{x}+7$ is

(a) strictly increasing

(b) strictly decreasing.

Solution:

$F^{\prime}(x)<0$ for $x \in(-2,3)$

hence in this interval function is decreasing.

Leave a comment

Close

Click here to get exam-ready with eSaral

For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.

Download Now