JEE Advanced Mathematics question

MathematicsBinomial TheoremJEE Advanced

In the expansion of

Answer: (A),(D)

Solution

For :

(1+={}^{2}-{}^{3}+{}^{4}-{}^{5}+ Missing or unrecognized delimiter for \big\big(general term (- {}^{r+2} Missing or unrecognized delimiter for \big\big).

For we must expand in powers of :

(1+=Missing or unrecognized delimiter for \Big\Big(1+Missing argument for \frac\frac1xMissing or unrecognized delimiter for \Big\Big=Missing or unrecognized delimiter for \Big\Big\{{}^{2}-{}^{3}Missing argument for \frac\frac1x+{}^{4}-Missing or unrecognized delimiter for \Big\Big\}.

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Question ID VK-108433