Fibonacci(x)

Algebra Level 5

A polynomial f(x)f(x) has all integer coefficients. Also, f(x)=x f(x)=x ONLY when x=1,2,3,5,8x=1,2,3,5,8 . Find the smallest positive integer solution for f(9)f(9).

Assume

-you may use a calculator for, +,-,/,*

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