TASK 2. Find An and Sn for each arithmetic sequence. A1 = 47,d = -7, 3rd term and sum of the first 3 terms 5th term and sum of the first 5 terms 11th term and sum of the first 11 terms 1. 2. A1 = 12, d = 6, 3. A1 = 9, d= -2,

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A: Since you have asked question with multiple sub-parts in a single request, we would be answering…

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Q: 3. State the next two terms of this sequence: 1, 3, 6, 10, 15 ...

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A: Explanation of the answer is as follows

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