_________ \/ 4 - 5*x
d / _________\ --\\/ 4 - 5*x / dx
Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Differentiate term by term:
The derivative of the constant is zero.
The derivative of a constant times a function is the constant times the derivative of the function.
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:
So, the result is:
The result is:
The result of the chain rule is:
Now simplify:
The answer is:
-25
--------------
3/2
4*(4 - 5*x)
-375
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5/2
8*(4 - 5*x)
-375
--------------
5/2
8*(4 - 5*x)