Jika f(x + 1) = 2x – 4, maka f(x) =
Jika f(x + 1) = 2x – 4, maka f(x) = ….
Pembahasan:
f(x + 1) = 2x – 4
x + 1 = y
x = y – 1
f(y) = 2(y – 1) – 4
= 2y – 2 – 4
f(y) = 2y – 6
Jadi nilai f(x) = 2x – 6
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