fungsi g(x)=ax+b. jika f(3)=4 dan f(-2)=-11, tentukanlah a.nilai a dan b b.bentuk fungsinya dibantu juseyoo >.<

Bab Barisan dan Deret
Matematika SMP Kelas VIII

f(x) = ax + b

nomor A]

f (3) =  3a + b =    4
f(-2) = -2a + b = -11
         ------------------- -
                   5a = 15
                     a = 3

3a + b = 4
3 . 3 + b = 4
b = 4 - 9
b = -5

nomor B

f(x) = 3x - 5

g(x) = ax + b
f(3) = 3a + b = 4
f(-2) = - 2a + b = - 11
------------------------------(-)
5a = 15
a = 3
3a + b = 4
3(3) + b = 4
9 + b = 4
b = 4 - 9
b = (-5)

b) f(x) = 3x - 5