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Use integration by parts to integrate the following function: x.sin(7x) dx

Integration by parts follows the general form: ∫u (dv/dx) = u.v - ∫v (du/dx)Let x = uLet sin 7x = (dv/dx)∫x.sin(7x) dx = x.(-1/7)cos(7x) - ∫(-1/7)cos(7x).1 dx = (-x/7)cos(7x) + (1/49)sin(7x) + c
AN
Answered by Ahanna N. • Maths tutor
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What evidence is there for delocalisation in benzene?

X-ray diffraction shows all carbon-carbon bonds in benzene are the same length (140 pm), between the lengths of a single (147 pm) and double bond (135 pm). This suggests that Kekule's alternating single and ...
WB
Answered by William B. • Chemistry tutor
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How do you manage learning so many tenses?

Practice suing those tenses in speech and writing when you can. If you get it wrong, don't worry! As long as you keep practising using those tenses, you'll be confident in using and manipulating those tenses...
LB
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What is the difference between a haploid and diploid cell

A haploid cell contains half the number of chromosome, for example a haploid human cell would have 23 chromosomes as opposed to 46. These haploid cells will be the sperm or egg cell (the gametes) A diploid c...
TD
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Explain two elements that may be considered to be aspects of ‘the rule of law’. Briefly explain why the independence of the judiciary is important in relation to the rule of law. [5]

One aspect of the rule of law is the equality before law. This principle can be seen in the case of R v Chaytor and it states that each individual must be treated equally before the law and there should not ...
RA
Answered by Raza A. • Law tutor
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