If - x -1 then the coefficient of x n in the expansion of 1-x-x2-2 will beA- None of theseB- 1C- nD- n-1

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Number of Terms in Binomial Expansion

If | x |<1 th...

Question

If |x| < 1 then the coefficient of $x^{n}$ in the expansion

of $(1 + x + x^{2} + . . . . . . .)^{2}$ will be

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n+1

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None of these

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