diketahui (gof)–¹ (x) = x-2/2 jika g(x) = x-1 tentukan nilai dari f–¹(7)

fungsi invers

(gof)⁻¹(x) = (x -2)/ 2
g(x)= x - 1
(gof)⁻¹ o f(x) =  x- 1
(gof)⁻¹{ f(x)}= x - 1
f(x) -2 / 2 = x - 1
f(x) -2 = 2(x -1)
f(x)= 2x -2 + 2
f(x)= 2x
f⁻¹(2x)= x
f⁻¹(7)= ...
2x = 7
x = 7/2

f⁻¹(7) = 7/2