The value of \[\int_{{}}^{{}}{x\sin kx\ dx}\]is

1.	The value of \[\int_{{}}^{{}}{x\sin kx\ dx}\]is
A.	\[\frac{\sin kx}{k}+c\]
B.	\[\frac{\cos kx}{k}+c\]
C.	\[\frac{\sin x}{k}+c\]
D.	\[-\frac{x\,\cos kx}{k}+\frac{\sin kx}{{{k}^{2}}}+c\]
Answer» E.

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The value of \[\int_{{}}^{{}}{x\sin kx\ dx}\]is

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