If 3rd, 4th, 5th terms in the expansion of `(a+x)^n` be 84, 280 and 560, Find x, a and n.

If the 6th,7th, 8th terms in the expansion of (x+y)^(n) be 112,7 and 1/4 find x,y and n.

n th term in the expansion of (x+(1)/(x))^(2n)

If 2nd, 3rd and 4th tems in the expansion of (x+y)^n be 240,720 and 1080 respectively, find x,y and n.

If the 3^(rd) , 4^(th) and 5^(th) terms in the expansion of (x + a)^(n) are 84, 280 and 560 respectively then find the values of a, x and n.

If the 2 nd,3 rd and 4 th terms in the expansion of (x+a)^(n) are 240,720 and 1080 respectively,find x,a,n .

If n be a positive integer and if the 3rd, 4th, 5th and 6th terms in the expansion of (x+A)^n, when expanded in ascending powers of x, be a, b, c and d respectively show that, (b^2-ac)/(c^2-bd)=(5a)/(3c)

Find the 4 th term in the expansion of (1-2x)^((3)/(2))

Find the 7th term in the expansion of ((4x)/5+5/(2x))^(8)