a. Find the first three terms when (1 2x) 5 is expanded, in ascending powers of

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a. Find the first three terms when (1 − 2x)⁵ is expanded, in ascending powers of x.
b. In the expansion of (3 + ax)(1 − 2x)⁵, the coefficient of x² is zero.
Find the value of a.

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Cambridge International AS And A Level Mathematics Pure Mathematics 1 Coursebook

ISBN: 9781108407144

1st Edition

Authors: Sue Pemberton, Julian Gilbey

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Question Posted: Mar 10, 2023 06:35 AM

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a. Find the first three terms when (1 2x) 5 is expanded, in ascending powers of

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a To expand 1 2x5 we can use the binomial theorem which states that 1 2x C5012x C5112x C...View the full answer

Cambridge International AS And A Level Mathematics Pure Mathematics 1 Coursebook

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