If 1 1-2 x+x^ 2 =1 + a 1 x + a 2 x 2 + ..., then the value of a r is
Mathematics · JEE Advanced · NTA Exams — Binomial Theorem And Its Simple Applications
If \(\frac{1}{1-2 x+x^{2}}\)=1 + a1x + a2x2 + ..., then the value of ar is
- 2r
- r + 1
- r
- r – 1
Answer
(B) r + 1
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