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Determine the A.p whose third term is 5 and the 7th term is 9 |
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Answer» a3 = a + (3 – 1)d = a + 2d = 5 ... (1)a7 = a + (7 – 1)d = a + 6d = 9 ... (2)Solving the pair of linear equations (1) and (2),a = 3, d = 1Hence, the required AP is 3, 4, 5, 6, 7,\xa0... Ap is 3,4,5,6,7........ 2,3,4,5,6,7..... . |
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