Mark against the correct answer in each of the following:

Question:

Mark $(\sqrt{)}$ against the correct answer in each of the following:

$\int\left(x 2^{x}\right) d x=?$

A. $\frac{2^{x}}{(\log 2)}(x+\log 2)+C$

B. $\frac{2^{x}}{(\log 2)^{2}}(x+\log 2-1)+C$

C. $\frac{x \cdot 2^{x}}{(\log 2)}+\frac{2^{x}}{(\log 2)^{2}}+C$

D. none of these

Solution:

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