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## Main Question or Discussion Point

I have a couple questions about a certain problem on http://www.math.ucdavis.edu/~kouba/CalcTwoDIRECTORY/intbypartssoldirectory/IntByPartsSol3.html#SOLUTION 16

On number 18...

1) What is the logic behind separating x^7 into x^4 x^3

2) In the translation from dv to v, how did x^3 become (1/12)? I fail to see what is happening here.

Thanks for the help guys.

On number 18...

1) What is the logic behind separating x^7 into x^4 x^3

2) In the translation from dv to v, how did x^3 become (1/12)? I fail to see what is happening here.

Thanks for the help guys.