2.7 Solving Modulus Problems
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The height of a maintenance lift, H H\,H metres, relative to the ground floor is recorded over time t t\,t seconds. The height is modelled by the function

H(t)=18−∣3t−21∣H(t) = 18 - |3t - 21|H(t)=18−∣3t−21∣

a.

Sketch the graph of H(t)H(t)H(t), marking the coordinates of any points where the graph intersects the axes and the coordinates of the vertex.

[4]
b.

Solve the inequality

18−∣3t−21∣<918 - |3t - 21| < 918−∣3t−21∣<9

[3]

2.7 Solving Modulus Problems Questions

Practise Edexcel A Level Maths 2.7 Solving Modulus Problems with exam-style questions for A Level Maths. 32 questions, 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.

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2.7 Solving Modulus Problems Questions

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