Diketahui suatu fungsi f(x) = ax + b mempunyai nilai f(2) = ─1 dan f(3) = 7. nilai dari f(5) adalah ....
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f(x) = ax + b
f(2) = 2a + b = -1
f(3) = 3a + b = 7ㅤ –
ㅤㅤ ㅤㅤ-a = -8
ㅤㅤㅤ ㅤ a = 8
2a + b = -1
2(8) + b = -1
16 + b = -1
ㅤㅤb = -1 – 16
ㅤㅤb = -17
f(x) = ax + b
f(5) = 8(5) – 17
f(5) = 40 – 17
f(5) = 23
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