If in the expansion of `(1+x)^m(1-x)^n` the coefficients of x and `x^2 and 3 and -6 respectivly then m is (A) 6 (B) 9 (C) 12 (D) 24

if in the expansion of (1+x)^m (1-x)^n the cofficients of x and x^2 are 3 and -6 respectively then m is

If in the expansion of (1+x)^(m)(1-x)^(n), the coefficients of x and x^(2) are 3 and -6 respectively,then m is:

If in the expansion f (1+x)^m(1-x)^n, the coefficient of x and x^2 are 3 and -6 respectively then (A) m=9 (B) n=12 (C) m=12 (D) n=9

If in the expansion of (1 +x)^(m) (1 - x)^(n) , the coefficients of x and x^(2) are 3 and - 6 respectively, the value of m and n are

In the expansion of (1+x+x^(2)+...oo)^(3) the coefficient of x^(n) is

In the expansion of ( 1 + x+ x^(2) + x^(3))^(6) , the coefficient of x^(14) is :

In the expansion of (1+3x+2x^(2))^(6), the coefficient of x^(11) is a.144 b.288 c.216 d.576