CSEC Additional Mathematics · 2016 · Paper 1 · Question Q9

The functions f and g are defined by f: x \to 2x - 5 and g: x \to 4 + \frac{3}{x}, x \ne 0. The composite function gf is defined by

1. (A)gf: x \to \frac{6}{x} - 5, x \ne 0
2. (B)gf: x \to 3 + \frac{6}{x}, x \ne 0
3. (C)gf: x \to \frac{8x - 17}{2x - 5}, x \ne \frac{5}{2}
4. (D)gf: x \to \frac{8x - 20}{2x - 5}, x \ne \frac{5}{2}