Diketahui F(X)=ax+b. Jika F(4)=-2 dan F(-4)=6 nilai F(8) adalah
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Pertanyaan
Diketahui F(X)=ax+b. Jika F(4)=-2 dan F(-4)=6 nilai F(8) adalah
1 Jawaban
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1. Jawaban missdiyun
f(x) = ax + b
f(4) = a(4) + b = - 2
f(-3) = a(-4) + b = 6
..
4a + b = - 2
- 4a + b = 6
--------------- --
8a = - 8
a = -8/8
a = - 1
4a + b = - 2
4(-1) + b = - 2
- 4 + b = - 2
b = - 2 + 4
b = 2
f(x) = ax + b
= - x + 2
f(8) = - (8) + 2
= -8 + 2
= - 6
jadi nilai f(8) = - 6