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1.3.1 Sequences and series

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Question 30

Expand $(9−2x)12\displaystyle (9-2x)^{\frac{1}{2}}$ in ascending powers of $x\,$ up to and including $x^3$

[4]

Write down the range of values of $x\,$ for which the expansion is valid.

[1]

Use your expansion, with a suitable value of $x$ , to find the value of $\sqrt{8.9}\,$ correct to 5 significant figures

[2]

Markscheme

1.3.1 Sequences and series Questions

A Level
Maths
1.3.1 Sequences and series

99 exam-style questions on CCEA A Level Maths 1.3.1 Sequences and series. Each one has a worked solution and a mark scheme showing where the marks go.

1.3.1 Sequences and series

Question bank

1.3.1 Sequences and series

Easy Medium

Question 30

Expand $(9−2x)12\displaystyle (9-2x)^{\frac{1}{2}}$ in ascending powers of $x\,$ up to and including $x^3$

[4]

Write down the range of values of $x\,$ for which the expansion is valid.

[1]

Use your expansion, with a suitable value of $x$ , to find the value of $\sqrt{8.9}\,$ correct to 5 significant figures

[2]

Markscheme

1.3.1 Sequences and series Questions

A Level
Maths
1.3.1 Sequences and series

99 exam-style questions on CCEA A Level Maths 1.3.1 Sequences and series. Each one has a worked solution and a mark scheme showing where the marks go.