Frequent Binomial Thoerem Questions

1 + 1+2/1! + 1+2+3/2! + 1+2+3+4/3! + ..... ∞ = (a) 0 (b) 1 (c) 7e/2 (d) 2e Brahmastra - Exponential and logarithmic series Q No.5 ...

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1.(multiple answer possible) If the sum of the coefficients in the expansion of (2x+y-z)^n is 128, then the value of r for which the coefficient of x^r in the expansion of (1+x)^n is the greatest is (A) 7 (B)3 (C)4 (D)5 ...

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Find the coefficient of xr in the following- (x+2)n+(x+2)n-1(x+1)+(x+2)n-2(x+2)2+.....+(x+1)n ...

3.nc0-8.nC1+13.nC2-18.nC3.......... upto (n+1) terms =? ...