\(\int \left(1+2x+3x^{2}+4x^{3}+\cdots\right)dx\) when \(\left(|x|<1\right)\) is equal to
Answer & explanation
Correct answer: option 2
\(\left(1-x\right)^{-1}=1+x+x^{2}+x^{3}+x^{4}+\cdots\)
\(\int \left(1+2x+3x^{2}+4x^{3}+\cdots\right)dx\) when \(\left(|x|<1\right)\) is equal to
Correct answer: option 2
\(\left(1-x\right)^{-1}=1+x+x^{2}+x^{3}+x^{4}+\cdots\)