SOLUTION: determine the critical numbers and the critical points for each of the following functions A. f(x)= x^3 + 13x^2 + 7x - 165 B. g(x)= X^3 +6x^2 - 13x

SOLUTION: determine the critical numbers and the critical points for each of the following functions A. f(x)= x^3 + 13x^2 + 7x - 165 B. g(x)= X^3 +6x^2 - 13x - 42 C. h(x)= x^3-10x^2

Question 63961: determine the critical numbers and the critical points for each of the following functions
A. f(x)= x^3 + 13x^2 + 7x - 165
B. g(x)= X^3 +6x^2 - 13x - 42
C. h(x)= x^3-10x^2 + 7x + 18
THESE PROBLEMS ARE TOUGH....I REALLY NEED HELP WITH THEM...I TRIED DOING THEM BUT THE ANSWERS AREN'T RIGHT BECAUSE I KNOW THERE ARE SUPPOSED TO BE 2 ANSWERS 4 EACH BUT IM NOT SURE HOW TO GET THE SECOND NUMBER...PLEASE HELP...THANK YOU

Answer by funmath(2933) (Show Source): You can put this solution on YOUR website!
determine the critical numbers and the critical points for each of the following functions
A. f(x)= x^3 + 13x^2 + 7x - 165
f'(x)=3x^2+26x+7
0=3x^2+26x+7
Use the quadratic formula:
a=3, b=26, and c=7

and
and
and
:
B. g(x)= X^3 +6x^2 - 13x - 42
g'(x)=3x^2+12x-13
0=3x^2+12x-13
Use the quadratic formula, a=3, b=12, and c=-13

and
and
and
:
C. h(x)= x^3-10x^2 + 7x + 18
h'(x)=3x^2-20x+7
0=3x^2-20x+7
Use the quadratic formula a=3, b=-20, and c=7

or
or
or
Happy Calculating!!!
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