Diketahui suatu funsi f bersifat f(-x) = -f(x) untuk setiap bilangan real x. Jika f(3) = –5 dan f(–5) = 1, maka f(f(–3)) = ….
(A) –5
(B) –2
(C) –1
(D) 1
(E) 2

Jawab: (C)

Dari soal diketahui:

  • f(-x) = -f(x)
  • f(3) = –5
  • f(–5) = 1

Sehingga, (f(-3)) = -f(f(3)) = -f(-5) = -1

Jadi, jika f(3) = –5 dan f(–5) = 1, maka f(f(–3)) = –1 (C).

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