(2-)⁵ + (2+)⁵ =

If the 3^rd, 4^th and 5^th terms of (x+a)ⁿ are 60, 160 and 240 respectively then (x,a,n)=

C₂+C₄+C₆+……….. =

In the expression of (x⁴- (1/x³))¹⁵ coefficient of x³² is equal to :

If the first three terms of (1+ax)ⁿ are 1,6x,6x² then (a,n)=