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The 7th term of an AP is 5 times the first term and its 9th term exceeds twice the 4th term by 1. The first term of the AP is-------- (A) 151 (B) -39 (C) 3 (D) – 124 |
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Answer» Correct option is (C) 3 a + 6d = 5a 6d = 4a Now, a + 8d = 2(a + 3d) + 1 ⇒ d = 2,a = 3 |
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