SOLUTION: please help me on the following assignment questions .how do i differentiate xcos3x with respect to x .how do i intergrate xcos3x with respect to x

Question 411547: please help me on the following assignment questions
.how do i differentiate xcos3x with respect to x
.how do i intergrate xcos3x with respect to x
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
To differentiate , use the product rule:

.

To integrate , use integration by parts. Let , . Then, and . Hence,

where C is any constant.
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