1.

Write down in terms of x and n, the term containingx^3 in the expansion of (1- (x)/(n) )^(n) by the binomial theorem. if this term equals (7)/(8) when x=-2, and n is a positive integer, calculate the value of n.

Answer»


Answer :`(- (N -1) (n-2))/( 6n^2) . X^(3) ; n =8`


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