Chain Rule: Power Rule
The Goal
Find
The Mistake
Find the mistake:
(Roll the mouse over the math to see a hint in red)
The Correction
(Roll the mouse over the area above to see the correction in blue)
An Explanation
The first part of using the chain rule is correct. But the second part, that of multiplying by the derivative of the inside expression, in this case 1-x2, is completely missing. Remember, the chain rule says:
In this example
