Diketahui fungsi f dengan f ( 3 - x )= 14 - 3 x. maka F ( 2 x - 6) =

Bab Relasi dan Fungsi

f(3 - x) = 14 - 3x
Misalkan
3 - x = a
x = 3 - a

f(a) = 14 - 3(3 - a)
f(x) = 14 - 9 + 3x
f(x) = 3x + 5

f(2x - 6)
= 3(2x - 6) + 5
= 6x - 18 + 5
= 6x - 13

Langsung aja y

f(3-x) = 14 - 3x
misal :
3-x = a
x = 3 - a

f(a) = 14 - 3(3-a)
f(a) = 14 - 9 + 3a
f(a) = 3a + 5
f(x) = 3x + 5

f(2x - 6) = 3(2x - 6) + 5
f(2x - 6) = 6x - 18 + 5
f(2x - 6) = 6x - 13

Semoga berguna +_+