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Core 3 Functions 2
1. Starter The function f is defined as follows: Given that (x – B) is a factor of f and x = –¾ is the line of symmetry of the graph of f, find A and B. Hence, state the range of f.
3. Composition of functions 1 The composite function fg is applied by operating on an input number with the function g then operating on the result with the function f. Find: a) ff(2) = 22 b) gg(–1) = –1 c) fg(3) = 5 d) gf(0) = 4 e) gfg(4) = 1
4. Composition of functions 2 Find the composite functions ff, fg, gf and fgf. Remember: fg means g followed by f.
5. Composition of functions 3 The functions f and g are defined below: Find the value of x such that gf(x) = fg(x).