Apply the quotient rule, which is:
and .
To find :
Differentiate term by term:
Apply the power rule: goes to
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: goes to
So, the result is:
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 5 + 2*x x + 5*x ------- - -------- x - 4 2 (x - 4)
/ 5 + 2*x x*(5 + x)\ 2*|1 - ------- + ---------| | -4 + x 2| \ (-4 + x) / --------------------------- -4 + x