ECZ 2021 · GCE Paper 2 · Question 6 — Computer and Calculator

Pseudocode given: Start; Enter length; If length < 0 THEN display error message 'length must be positive'; Else enter height; If height < 0 THEN display error message 'height must be positive'; Else volume = 13* length³ * height; End if; Display volume; Stop.

(a) Express 22x - 1- 33x - 1as a single fraction in its simplest form.[3]

Verified working — step 1

Combine over common denominator (2x-1)(3x-1):

(b) Draw a corresponding flowchart for this pseudocode.[5]

Verified working — step 1

Draw the flowchart using standard symbols as follows:

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Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

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