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4.2 Expanding (a + bx)^n

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Question 8

Expand $(9+18x)−12\displaystyle (9+18x)^{-\frac{1}{2}}$ 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]

Markscheme

4.2 Expanding (a + bx)^n Questions

A Level
Maths
4.2 Expanding (a + bx)^n

99 exam-style questions on Edexcel A Level Maths 4.2 Expanding (a + bx)^n. Each one has a worked solution and a mark scheme showing where the marks go.

4.2 Expanding (a + bx)^n

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4.2 Expanding (a + bx)^n

Easy Medium

Question 8

Expand $(9+18x)−12\displaystyle (9+18x)^{-\frac{1}{2}}$ 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]

Markscheme

4.2 Expanding (a + bx)^n Questions

A Level
Maths
4.2 Expanding (a + bx)^n

99 exam-style questions on Edexcel A Level Maths 4.2 Expanding (a + bx)^n. Each one has a worked solution and a mark scheme showing where the marks go.