Composite Functions — XAT Previous-Year Questions
1 previous-year question on Composite Functions from XAT, with full solutions. Practise free — check answers as you go; sign in to save your progress.
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Composite Functions · XAT PYQs
XAT 2017 · QA & DI
Q1.
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: