If f(x) = ax + b, a and b are positive real numbers and if f... — Quantitative Ability and Data Interpretation 2017

Question 268 Quantitative Ability and Data Interpretation 2017 Medium MCQ +1.00 marks · -0.25 negative

If f(x) = ax + b, a and b are positive real numbers and if f(f(x)) = 9x + 8, then the value of a + b is:

A. 3 B. 4 C. 5 D. 6 E. None of the above

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