On the curve, the points at which the gradient of the curve is equal to zero are
A.
c, d, f. i, l
B.
b, e, g, j, m
C.
a, b, c, d, f, i, j, l
D.
c, d, f, h, i, l
Correct answer is B
The gradient of any curve is equal to zero at the turning points. i.e. maximum or minimum points. The points in the above curve are b, e, g, j, m