jika f(x)=7x-2 maka f pangkat -1 (x + 1) =

jawab

f(x) = 7x - 2
f ⁻¹ (7x - 2) = x
7x - 2 = a
7x = a + 2
x = 1/7 (a + 2)

f ⁻¹ (a) = 1/7 ( a+ 2)
f ⁻¹ (x + 1)  = 1/7 (x + 1 + 2)
f ⁻¹ (x +1)= 1/7 (x + 3)