salam sahabat.please help me to solve this question.

if f(x) = ax + b , and f^3(x) = 64x + 21 , find the rule of f^n(x).i appreciate everyone's help.

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- Feb 12th 2010, 07:16 PMmuslimfunctions prob
salam sahabat.please help me to solve this question.

if f(x) = ax + b , and f^3(x) = 64x + 21 , find the rule of f^n(x).i appreciate everyone's help. - Feb 12th 2010, 09:18 PMSoroban
Hello, muslim!

Quote:

Since

. . we have: .

Equating coefficients: .

From [1]: .

Substitute into [2]: .

Hence:. .

We have:

. .

Therefore: .

- Feb 12th 2010, 09:39 PMmuslimthanx