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The fifth term of a p is 26 and its 10th term is 51 find a p |
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Answer» U can\'t get the whole A.P until n is mentioned. I don\'t understand why people answer for 15th term of the A.P. A5 = 26a + 4d = 260........... (1)a10 = 51a + 9d = 51...............(2)Subtracting eq.(i) from eq.(ii) we getd = 5putting d = 5 in eq.(i) we geta + 4(5) = 26a + 20 = 26a = 6a15\xa0= a + 14da15\xa0= 6 + 14(5)a15\xa0= 6 + 70a15\xa0= 76Hence the 15th term of the AP is 76. |
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