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    Hi,

    I can't seem to see how the second part of the attached question (the integration by parts twice) follows from the first part of the question - I keep on getting minus the answer given. Can anyone see where I might going wrong/ confirm that I'm doing the right thing?

    Thanks
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    I've attached a photo of my solution if that helps.
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Updated: January 18, 2015
Poll
Do you agree with the proposed ban on plastic straws and cotton buds?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

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