Question

Jika f(2x + 1)=6x+5, maka nilai f(-4) adalah...

Answer 1

Verified answer

F(2x+1) = 6x + 5
misal, u = 2x + 1
x = (u-1)/2
f(u) = 6((u-1)/2) + 5
f(u) = 3u-3+5
f(u) = 3u+2
f(x) = 3x+2

maka f(-4) = 3(-4) + 2 = -12+2 = -10

semoga membantu
ㅡ :)

Answer 2

Verified answer

F(2x+1) = 6x +5

Agar menjadi f(-4) kita cari x yg memenuhi
2x+1= -4
2x = -5
x = -5/2

Masukkan x= -5/2
f(2x+1) = 6x +5
f(2(-5/2) +1) = 6(-5/2) +5
f(-4) = -15 +5 = -10

Semoga membantu