116k views
20 votes
Determine the relative maxima of f(x)=2x^3-3x^2. Also describe where the function os increasing and decreasing.

1 Answer

3 votes

Answer:

Below in bold.

Explanation:

f(x)=2x^3-3x^2

Finding the derivative and equating to zero:

f'(x) = 6x^2 - 6x = 0

6x(x - 1) = 0

So there are turning point at x = 0 and 2 = 1.

Finding the relative maximum:

Second derivative is negative when we have a maximum value:

f"(x) = 12x - 5

- which is negative when x = 0.

So the relative maximum is at x = 0 where f(x) = 2(0)^3 - 3(0)^2 = 0.

At x = 1, second derivative = 12(1) - 5 = +7 so this is a relative minimum.

The function is increasing in interval -∝ < x < 0

decreasing in interval 0 < x < 1

then increasing in interval 1 < x < ∝

User Saralynn
by
8.5k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories