Course home

3.4.1 Sequences and Series (A-level only)

Easy Medium

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

Question 13

Expand $(5+2x)12\displaystyle (5+2x)^{\frac{1}{2}}$ 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 $x = 0.5$ , to find an approximation of the value of $6\sqrt{6}$ . Give your answer to 3 decimal places.

[3]

Markscheme

3.4.1 Sequences and Series (A-level only) Questions

A Level
Maths
3.4.1 Sequences and Series (A-level only)

43 exam-style questions on WJEC A Level Maths 3.4.1 Sequences and Series (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

3.4.1 Sequences and Series (A-level only)

Question bank

3.4.1 Sequences and Series (A-level only)

Easy Medium

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

Question 13

Expand $(5+2x)12\displaystyle (5+2x)^{\frac{1}{2}}$ 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 $x = 0.5$ , to find an approximation of the value of $6\sqrt{6}$ . Give your answer to 3 decimal places.

[3]

Markscheme

3.4.1 Sequences and Series (A-level only) Questions

A Level
Maths
3.4.1 Sequences and Series (A-level only)

43 exam-style questions on WJEC A Level Maths 3.4.1 Sequences and Series (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.