Question

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

Answer 1

the power 7 on all expansion or on the next term

Answer 2

if the expansion is (x+(1/a(x)^2))^7 the expand is

Answer 3

put coefficient of x=7/3
21/a=7/3
a=9

Answer 4

only 9? can a also equal -9?

Answer 5

there exist something wrong

Answer 6

in this expansion no coefficient to x