Question

The coefficient of x in the expansion of (x+1/ax^2)^7 is 7/3. Find the possible values of a.

Answer 1

((x+1)/ax^2) ??? or
(x+(1/ax^2)) ???

Answer 2

i think the latter one.

Answer 3

(x+1/ax^2)^7

Answer 4

7/a

Answer 5

might be..