Common Calculus Mistakes
Product Rule: Constants |

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
In the second factor the constant 200 has derivative 0, but the student left the 200 in place, perhaps distracted by differentiating the following term (1/2)r |

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