what did you get for f'(x) ?
For the function is defined by On which two intervals is the function increasing
I got -11 to 6 as one interval
and only part of the other one which is (some # to 10)
What is the "some #" please help this is due tonight. thank you
Hello, Lambo!
The function is increasing when is positive.For , the function is defined by: .
On which two intervals is the function increasing ?
I got -11 to 6 as one interval . . . . sorry, no
The derivative is: .
So we have: .
This product is positive when: .
(1) All three factors are positive.
. . is always positive, except when
. .
. .
All three are satisfied if: .
. . The interval is: .
(2) Two factors are negative.
. . is always positive, except when
. .
. .
All three are satisfied if: .
. . The interval is: .