indefinite-integration

Question: $\int_{{}}^{{}}{(1+2x+3{{x}^{2}}+4{{x}^{3}}+......)\ dx=}$



1) ${{(1+x)}^{-1}}+c$
2) ${{(1-x)}^{-1}}+c$
3) ${{(1-x)}^{-1}}-1+c$
4) None of these
Solution: Explanation: No Explanation
Fundamental integration

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