It is known that f (x) - 2F (1 / x) = 2x + 3 / X (x is not equal to 0)

It is known that f (x) - 2F (1 / x) = 2x + 3 / X (x is not equal to 0)


f(x)-2f(1/x)=2x+3/x…… (1)
Let x = 1 / X
f(1/x)-2f(x)=2/x+3x…… (2)
(1) + 2 * (2)
-3f(x)=8x+7/x
f(x)=-8x/3-7/3x