2 x + x - 1 ---------- x + 2
(x^2 + x - 1)/(x + 2)
Apply the quotient rule, which is:
and .
To find :
Differentiate term by term:
The derivative of the constant is zero.
Apply the power rule: goes to
Apply the power rule: goes to
The result is:
To find :
Differentiate term by term:
The derivative of the constant is zero.
Apply the power rule: goes to
The result is:
Now plug in to the quotient rule:
Now simplify:
The answer is:
2 1 + 2*x x + x - 1 ------- - ---------- x + 2 2 (x + 2)
/ 2 \ | -1 + x + x 1 + 2*x| 2*|1 + ----------- - -------| | 2 2 + x | \ (2 + x) / ----------------------------- 2 + x