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C4 integration by parts help! watch

1. i can find the answer using integration by substitution but cant seem to get the same answer when working it out using integration by parts

∫x(2x+1)³ and the limits are 1,0
2. Try u=x and v'=(2x+1)^3

Substitution is easier, does the question ask for parts?
3. (Original post by Estelle123)
i can find the answer using integration by substitution but cant seem to get the same answer when working it out using integration by parts

∫x(2x+1)³ and the limits are 1,0
If you show us your working we could show you where you're going with using Integration by Parts.
4. I tried both, got different answers...i think i'm tired though.
The shortest method on paper is to expand the brackets, think about it...no negatives to deal with, and the limit at 0 is 0.
I got 71/10 for two of the answers
5. (Original post by jameswhughes)
Try u=x and v'=(2x+1)^3

Substitution is easier, does the question ask for parts?
yh i no i got the right answer for substitution but unfortunately they ask for it in parts too
6. (Original post by deltabomber)
I tried both, got different answers...i think i'm tired though.
The shortest method on paper is to expand the brackets, think about it...no negatives to deal with, and the limit at 0 is 0.
I got 71/10 for two of the answers
ahh ok yes thats the right answer so I'll try it that way thanks!

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