\( \mathrm{y}=2 \mathrm{x}+3 \mathrm{x}^{2}+4 \mathrm{x}^{3}+\cdots \) হলে, নিচের কোনটি সত্য?

A \( (1+x)^{2}=(1-y)^{-1} \)

B \( 1+y=(1+x)^{-2} \)

C \( 1+y=(1+x)^{-1} \)

D \( (1-x)^{2}=(1+y)^{-1} \)

Solution

Correct Answer: Option D

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