The thermal intensity H H\,H of a heating element over a distance x x\,x from its center is modeled by the function
H(x)=A−∣5x−B∣ H(x) = A - |5x - B| H(x)=A−∣5x−B∣where A A\,A and B B\,B are positive constants, with A>BA > BA>B.
Find, giving your answers in terms of A A\,A and BBB: (i) the coordinates of the maximum point of the graph of H(x)H(x)H(x), (ii) the coordinates of the point of intersection of the graph with the yyy-axis, (iii) the coordinates of the points of intersection of the graph with the xxx-axis.
Sketch the graph of H(x)H(x)H(x) and, on the same axes, add the graph with equation G(x)=2∣x∣−5G(x) = 2|x| - 5G(x)=2∣x∣−5.
Given that the graphs of H(x)H(x)H(x) and G(x)G(x)G(x) intersect at the points where x=−1x = -1x=−1 and x=3x = 3x=3,
find the value of A A\,A and the value of BBB.
471 exam-style questions on Edexcel A Level Maths Functions and Graphs, 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. Each one has a worked solution and a mark scheme showing where the marks go.