\[\int_{{}}^{{}}{x\sqrt{1+{{x}^{2}}}}\ dx=\] [MP PET 1989]

\[\frac{1+2{{x}^{2}}}{\sqrt{1+{{x}^{2}}}}+c\]

\[\frac{1}{3}{{(1+{{x}^{2}})}^{3/2}}+c\]

\[\int_{{}}^{{}}{x\sqrt{1+{{x}^{2}}}}\ dx=\]

1.	\[\int_{{}}^{{}}{x\sqrt{1+{{x}^{2}}}}\ dx=\] [MP PET 1989]
A.	\[\frac{1+2{{x}^{2}}}{\sqrt{1+{{x}^{2}}}}+c\]
B.	\[\sqrt{1+{{x}^{2}}}+c\]
C.	\[3{{(1+{{x}^{2}})}^{3/2}}+c\]
D.	\[\frac{1}{3}{{(1+{{x}^{2}})}^{3/2}}+c\]
Answer» E.

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\[\int_{{}}^{{}}{x\sqrt{1+{{x}^{2}}}}\ dx=\] [MP PET 1989]

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