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2. Three terms of an arithmetic sequence are u, = 4.9, u, =6, u =7.1. (a) Find the common difference. [2] (b) Find the first

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2. Three terms of an arithmetic sequence are u, = 4.9, u, =6, u =7.1. (a) Find the common difference. [2] (b) Find the first term. [2] (c) Find the exact sum of the first 38 terms. [2]

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