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Determine the A.P. whose their term is 16 and the difference of 5th term from 7th term is 12. |
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Answer» Given : a3 = a + (3 - 1) d = a + 2d = 16 .....(i) a7 - a5 = 12 ....(ii) (a + 6d) - (a + 4d) = 12 a + 6d - a - 4d = 12 2d = 12 d = 6 Put d = 6 in equation (i) a = 16 – 12 a = 4 So, A.P. is 4, 10, 16, 22, 28, ...... |
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