Question

Q[+50]

f(x)=(3x-18)/3

f-¹(x)=?​

Answer 1

Materi : Invers Fungsi

y = ( 3x - 18 )/3

3y = 3x - 18

y = x - 6

- x = - y - 6

x = y + 6

f-¹(x) = x + 6

Semoga bisa membantu

Answer 2

f(x)=(3x-18)/3

f-¹(x)= x + 6

Penyelesaian :

f(x) = (3x-18)/3

3a = 3x - 18

3a = ( 3x ÷ 3 ) - ( 18 ÷ 3 )

a = x - 6

-(x) = -a + ( -6 )

-(x) = -a - 6

x = ( -a - 6 ) ÷ ( -1 )

x = a + 6

f-¹ ( x ) = x + 6