Use integration by parts to establish a reduction formula for the integral.
A. 
= xn ex - 
B. 
= xn ex - n 
C. 
= xn ex + n 
D. 
= xn ex - n 
Answer: B
Mathematics
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Solve the problem.A stack of poles has 21 poles in the bottom row, 20 poles in the next row, and so on, with 10 poles in the top row. How many poles are there in the stack?
A. 160 B. 186 C. 176 D. 196
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Add or subtract. Express the answer as a mixed number.
A. 3
B. 12
C. 13
D. 13
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Translate the phrase to an algebraic expression.Five less than x
A. 5 - x
B. 
C. x - 5
D. 5x
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Set up the initial simplex tableau for the following problem. Minimize 
subject to
A. 
B. 
C. 
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