diketahui f(4×-1)=8×+4 nilai f (3) adalah

Mapel : Matematika

Kelas : 10

Bab : Relasi dan Fungsi
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f(4x - 1) = 8x + 4


Misalkan :

4x - 1 = y

4x = y + 1

x = (y + 1)/4


Maka,

f(x) = 8[(x + 1)/4] + 4

f(x) = 2x + 2 + 4

f(x) = 2x + 6


Sehingga nilai f(3)

f(3) = 2(3) + 6

f(3) = 6 + 6

f(3) = 12 ✔