Tolong dongMateri:Fungsi Invers

Tolong dongMateri:Fungsi Invers

a. y = 4x-2/5x+3

5xy + 3y = 4x – 2

5xy – 4x = -2 -3y

x (5y-4) = -2 -3y

f(x) = $frac{-2 -3x}{5x-4}$

b. f (1) = $frac{-2 -3(1)}{5(1)-4}$

= -5

c. f(a) = $frac{-2 -3a}{5a-4}$

$-frac{1}{2}$ = $frac{-2 -3a}{5a-4}$

4-5a = -4-6a

a = -8