Diketahui fungsi f adalah f(x)=ax+b.jika f(-2)=-17 dan f(5)=32, maka nilai a+b adalah

Fungsi

f(x) = ax + b

f(-2) = -2a + b = -17
f(5) = 5a + b = 32

-2a + b = -17
5a + b = 32
___________ _
7a = 49
a = 49/7
a = 7

5a + b = 32
5 x 7 + b = 32
35 + b = 32
b = 32 - 35
b = -3

Nilai a + b = 7 + (-3) = 4

*semoga membantu. sukses selalu ^_^

f(x)  = ax + b
f(-2) = a ( -2) + b = -17
          -2a + b = -17
f(5)  = a(5) + b = 32
          5a + b = 32
-2a + b = -17
 5a + b =  32
______________ -
-7a       = - 49
a          = -49/-7
a          = 7
5a + b = 32
5(7) + b = 32
35 + b = 32
b = 32 - 35
   = -3
a + b  = 7 + (-3)
          = 4