Question

why do we use second derivative​

Answer 1

Answer:

We can often use the second derivative of the function, however, to find out when x is a local maximum or a local minimum. ... The positive second derivative at x tells us that the derivative of f(x) is increasing at that point and, graphically, that the curve of the graph is concave up at that point.

Answer 2

Explanation:

first find first derivative whatever answer comes take that answer as question and again find derivative.

Hope it helps you buddy..........,.....