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

Find the 10th term in the expansion of 5^x

Find the 5th term in the expansion of (1+x^2)^12

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

The 6^(th) term in the expansion of 5^x is

Find the 111th term in the expansion of (1+3x)^111.

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

Find the 7th term in the expansion of ((4x)/5-5/(2x))^9 .

Find the 6th term in the expansion of ((4x)/5-5/(2x))^9 .

Find the 7th term in the expansion of ((4x)/5-5/(2x))^9 .

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