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f(2) = 2a+b = 1
f(4) = 4a+b = 7
-2a = -6
a = -6
-2
a = 3
4a+b = 7
4 . 3 + b =7
12 + b = 7
b = 7 -12 = -5
a+2b
3 + 2 . -5 = -7
maaf jika ada yang salah
9 = a(3) +b
9 = 3a +b
f(x) = ax +b
-15 = a(-3) +b
-15 = -3a +b
3a +b = 9
-3a +b = -15 +
2b = -6
b = -6 / 2
b = -3
-3a +b = -15
-3a +(-3) = -15
-3a = -15 +3
-3a = -12
a -12 / -3
a = 4
f(x) = ax +b
f(-2) = 4(-2) +(-3)
= -8 +(-3)
= -11
f(x) = ax +b
f(2) = 4(2) +(-3)
= 8 +(-3)
= 5
f(-2) +f(2)
-11 +5
-6