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4.2 Expanding (a + bx)^n

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Question 79

Find the first 4 terms, in ascending powers of $x$ , of the binomial expansion of

3 - 4x)^7

giving each term in simplest form.

[4]

This expansion is to be used to find an approximation for $2.96^7$ . State the value of $x$ that should be used. (There is no need to carry out this calculation.)

[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

Question bank

4.2 Expanding (a + bx)^n

Easy Medium

Question 79

Find the first 4 terms, in ascending powers of $x$ , of the binomial expansion of

3 - 4x)^7

giving each term in simplest form.

[4]

This expansion is to be used to find an approximation for $2.96^7$ . State the value of $x$ that should be used. (There is no need to carry out this calculation.)

[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.