Jika f(x) = ax + b, f(3) = 5 dan f(7) = 13, maka f(2) =
Jawab:
3
Penjelasan dengan langkah-langkah:
Jika f(x) = ax + b, f(3) = 5 dan f(7) = 13, maka f(2) =
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ax + b
3a + b = 5
7a + b = 13
__________-
– 4a = – 8
a = 2
3a + b = 5
3 x 2 + b = 5
6 + b = 5
b = 5 – 6
b = – 1
ax + b
2 x 2 + ( – 1 )
4 + ( – 1 )
4 – 1
3