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Find the first three terms in the expansion of (4-x)^(-1/2) in ascending powers of x.

(4-x) -1/2 = (4 (1 - x/4)) -1/2 = 1/2 (1 - x/4) -1/2 = 1/2 ( 1 + x/8 + 3x 2 /128 + ...) = 1/2 + x/16 + 3x 2 /256 + ...Therefore the first three terms are 1/2 + x/16 + 3x 2 /256
Answered by • Maths tutor
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Refer to question taken from Edexcel Maths Paper

Refer to question taken from Edexcel Maths Paper.
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Answered by Angus B. • Maths tutor
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How do you solve a quadratic equarion

with quadratic equations you will either get two x values for your answer, one value or zero values. This can be tested by rhe value of your discriminant when values have been subbed in. If it’s greater than...
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Answered by Henry B. • Maths tutor
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How can I prepare effectively for UK medical school interviews?

UK Medical schools have various methods of interviewing candidates. The interview may be in the form of an MMI, panel or group. I feel it 's vital to help students tailor their applications clearly to their ...
JA
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Describe the elements of the cognitive interview (6 marks)

The first step is reinstate the context whereby the interviewer asks the eyewitness to mentally and physically imagine and recall the crime scene including environmental context of crime scene e.g. smell, pe...
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Answered by parisa k. • Psychology tutor
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