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f(-3) = -15
-15 = -3a + b
f(3) = 9
9 = 3a + b
-3a + b = -15
3a + b = 9 -
-6a = -24
a = 4
-3a + b = -15
-12 + b = -15
b = -3
Rumus fungsi :
f(x) = 4x - 3
f(-2) + f(2) = -11 + 5
=
f(-3) = a(-3) +b = -15
= -3a +b = -15
f(3) = a(3) +b = 9
= 3a +b = 9
-3a +b = -15
3a +b = 9 +
2b = -6
b = -3
-3a +b = -15
-3a +(-3) = -15
-3a = -15 +3
-3a = -12
a = 4
f(x) = 4x +(-3)
f(-2) = 4(-2) +(-3)
= -8 +(-3)
= -11
f(2) = 4(2) +(-3)
= 8 +(-3)
= 5
Maka,
f(-2) +f(2)
= -11 +5
= -6