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e eighth term of an A.P. is half of its second term and the eleventh term exceeds oneird of its fourth term by 1. Find the 15th term.Find the arithmetic progression whose third term is 16 and seventh term exceeds itsNCERT]CBSE 2004]fifth term by 12.e ca rind the A.P |
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Answer» a + 7d = a + d/22a + 14d = a + da = -13da +10d = 1/3(a +3d) + 1a +10d -1 = 1/3(a + 3d)3(a + 10d -1) = a +3d3a + 30d -3 = a+ 3d2a + 27d =32(-13d) + 27d =3(since a = -13d)-26d + 27d = 3d = 3a= -13da = -39a + 14d = -39 + 42hence a15 =3 |
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