A.nilai a dan b
jan ngasal yang gak tau gaush jawb
Fungsi F di tentukan oleh f(x) = aX+b jika f(4) = 5
Jawab :
f(4) = 5
4a + b = 5
f(-2) = 7
-2a + b = 7
4a + b = 5
-2a + b = 7
_________ –
2a = – 2
a = – 1
4a + b = 5
4(-1) + b = 5
-4 + b = 5
b = 5 + 4
b = 9
jadi,
a = – 1
b = 9