Question

need help finding maxima and minima for fx=x3-3x2-1!!!!

Answer 1

Step 1. Find
$$\huge f′(x)$$
first .
Step 2. Find the points where
$$\huge f′(x)$$
is equal to 0.
Step 3. Find
$$ \huge f′′(x)$$
at those points.
Step 4. If the value is negative than it is the maxima and negative than minima.

Answer 2

ok, so f'x= 3x^2-6x

Answer 3

the zeros are 0 and 2

Answer 4

how do I find f''x at those points?

Answer 5

the second derivative is 6x-6

Answer 6

do i plug them in there?

Answer 7

differentiate $$\huge f'(x) $$ again. Then u will find f''x

Answer 8

yes, plug the values of the zeroes of the equation in 6x-6

Answer 9

ok, for 0 its negative and for 2 its positive

Answer 10

now what?

Answer 11

If the value is negative then it is the maxima and negative than minima.

Answer 12

#if positive than minima.

Answer 13

ok thanks!