Question

Invers dari f (x) = ½ x – 4 adalah ... bantuin donk,,,

Answer 1

F(x) = 1/2 x - 4
2 f(x) = x - 8
x = 2 f(x) + 8
f^-1(x) = 2x + 8
atau
f(x) = 1/2 x - 4
f^-1( 1/2 x - 4) = x
1/2 x - 4 = a
x  - 8 = 2a
x = 2a - 8
f^-1(a) = 2a-8
f^-1(x) = 2x - 8