The functions f f\,f and g g\,g are defined by
f:x→ln(5x−2),x∈R,x>25 f: x \rightarrow \ln(5x - 2), \quad x \in \mathbb{R}, x > \frac{2}{5} f:x→ln(5x−2),x∈R,x>52 g:x→2x−4,x∈R,x≠4 g: x \rightarrow \frac{2}{x-4}, \quad x \in \mathbb{R}, x \neq 4 g:x→x−42,x∈R,x=4Find the exact value of fg(6)fg(6)fg(6)
Find an expression for f−1(x)f^{-1}(x)f−1(x) and state its domain
Sketch the graphs of f(x)f(x)f(x) and f−1(x)f^{-1}(x)f−1(x) on the same diagram
Sketch the graph of y=∣g(x)∣y = |g(x)|y=∣g(x)∣
Find the exact values of ∣2x−4∣=4\displaystyle | \frac{2}{x-4} | = 4∣x−42∣=4
Practise Edexcel A Level Maths Functions and Graphs with exam-style questions for A Level Maths. 100 questions covering 2.1 The Modulus Function, 2.2 Functions and Mappings, 2.3 Composite Functions, 2.4 Inverse Functions, 2.5 y=|f(x)| and y=f(|x|), 2.6 Combining Transformations, and 2.7 Solving Modulus Problems, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.