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Find the 20th term of the AP 9, 13, 17, 21, ……. |
Answer» Given: AP is 9, 13, 17, 21, …… Here, first term = a = 9 Common difference = d = 13 – 9 = 4 an = a + (n-1)d a20= 9 + (20-1)4 = 85 |
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