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What is June 2005 Edexcel Maths Mark Scheme about?

M1 is for applying the correct formula for the sum of an arithmetic series or quoting the formula. M1 is also awarded for finding the first term a and common difference d. The first A1 is for the sum to n = 4 terms. The final A1 is for evaluating the infinite sum using the formula for the sum of an infinite GP. Deductions may be made for extraneous or incorrect answers.

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JohnSmith334544

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