bantu ya dengan cara nya

19) f(x) = 2x + 5
f-¹(x) = (x - 5)/ 2
g(x) = x - 2
g-¹(x) = -x + 2

(f-¹ o g-¹) = (-x + 2 - 5) / 2
(f-¹ o g-¹) = (-x - 3) / 2

20) f(x) = 6x + 5
g(x) = ⅓(x + 4)

(g o f) (x) = ⅓(6x + 5 + 4)
= ⅓ (6x + 9)
= 2x + 3

(g o f) -¹(x) = (x - 3) /2

x = 5
(5 - 3) / 2 = 1