Find a, b and n in the expansion of `(a+b)^n`if the first three terms of the expansion are 729, 7290 and 30375, respectively.

Find the a,b, and n in th expansion of (a+b)^(n) if the first three terms of the expansion are 729,7290, and 30375, respectively.

If the first three terms in the expansion of (1+ax)^(n) are 1,8x,24x^(2) respectively,then a=

Find the middle term in the expansion of (1+x)^(2n)

Find a if the and and terms of the expansion terms of the expansion are equal.

Find the number of terms in the expansion of (a+b+c)^(n).

If the first three terms in the expansion of (1+ax)^n are 1,12 x , 64x^2 , find 'n' and 'a'