find the n th term of the sequence 2,5,10,7,......
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To find the 1st term, put n = 1 into the formula, to find the 4th term, replace the n's by 4's: 4th term = 2 × 4 = 8. What is the nth term of the sequence 2, 5, 10, 17, 26... ? This is the required sequence, so the nth term is n² + 1.
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