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4.2 Expanding (a + bx)^n

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Question 35

A theoretical model for the refractive index $μ\mu$ of a specialized optical glass depends on the incident light wavelength $λ\lambda$ according to the relation

\mu(\lambda) = \left( \frac{16}{25} + \frac{2}{5}\lambda \right)^{-\frac{3}{2}}

Determine the range of values of $λ\lambda$ for which the binomial expansion of $μ(λ)\mu(\lambda)$ in ascending powers of $λ\lambda$ is valid.

[3]

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

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Question 35

A theoretical model for the refractive index $μ\mu$ of a specialized optical glass depends on the incident light wavelength $λ\lambda$ according to the relation

\mu(\lambda) = \left( \frac{16}{25} + \frac{2}{5}\lambda \right)^{-\frac{3}{2}}

Determine the range of values of $λ\lambda$ for which the binomial expansion of $μ(λ)\mu(\lambda)$ in ascending powers of $λ\lambda$ is valid.

[3]

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.