If is a polynomial function satisfying

MATHEMATICS · Subjective · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

If f:R+→R+f:\mathbb R^+\to\mathbb R^+ is a polynomial function satisfying f(f(x))=6x−f(x)f(f(x))=6x-f(x), then find f(17)f(17).

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