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Jika A(x) = 2x – x2 dan A(x) – B(x + 1) = 0, maka B(x – 1)

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Jika A(x) = 2x – x2 dan A(x) – B(x + 1) = 0, maka B(x – 1) sama dengan ….

Jawab:

A(x) = 2x – x2

A(x) – B(x + 1) = 0

B(x + 1) = A(x)

B(x + 1) = 2x – x2

Sehingga:

B(x – 1) = B(x + 1 – 2)

          = 2(x – 2) – (x – 2)2

          = 2x – 4 – (x2 – 4x + 4)

          = -x2 + 6x – 8

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