a. Nilai a dan b!
b. Nilai f(2) !
d jwb kk..
Diketahui fungsi f(x) = ax + b. Jika f(-4) = 6 dan f(6) = -4, maka tentukan :
Jawaban Terkonfirmasi
Mapel : Matematika
Bab : Fungsi
f(x) = ax + b
f(-4) = -4a + b = 6
f(6) = 6a + b = -4
———————— -
-10a = 10
a = 10/-10
a = -1
6a + b = -4
6(-1) + b = -4
-6 + b = -4
b = -4 + 6
b = 2
f(x) = ax + b
f(2) = -2(2) + 2
f(2) = -2 + 2
f(2) = 0
Jawaban Terkonfirmasi
A.
f(-4) = a(-4) + b f(6) = a(6) + b
*6 = -4a + b *-4 = 6a + b
(6 = -4a)-(-4 = 6a) = (10 = -10a)
a = -1
*6 = -4a + b
6 = -4(-1) + b
6 = 4 + b
2 = b
f(2) = ax + b
f(2) = (-1)(2) + (2)
f(2) = -2 + 2
f(2) = 0