Question

If a function is defined as y = 3x^3 - 2x^2 + 7. The
value of x for which the function has maximum
value is
(1) 9/4
(2) 4/9
(3) 4
(4) zero

Answer 1

Answer:

For maximum value

Put 1st deivative equals to 0

Lets differentiate

3x*3 - 2x*2 +7

After diffrentiation

9x*2 - 4x =0

9x*2 = 4x

After solving

x = 4/9