Types of functions, domain, range, composition, inverse, real-valued functions.
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Q1 · Functions · MEDIUM
The domain of the function f(x) = √(x - 3) is:
Q2 · Functions · HARD
If f: R → R is defined by f(x) = (x + 1)/(x - 1), then f(f(x)) equals:
Q3 · Functions · MEDIUM
If f(x) = x² - 4x + 7 and g(x) = 2x + 1, then f(g(1)) equals:
Q4 · Functions · EASY
If f(x) = 3x + 5, then f(2) equals: