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The number of terms in an A.P. -3, 3, 9, 15,………..,201 is:1. 352. 343. 324. 33 |
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Answer» Correct Answer - Option 1 : 35 Given: The number of terms in an A.P. -3, 3, 9, 15,………..,201 Formula used: d = t2 – t1 a + (n – 1)d where, a = first term, n = last term and d = common difference Calculation: a = -3 d = 3 – (-3) ⇒ d = (3 + 3) = 6 nth term = 201 According to the question ⇒ a + (n – 1)d ⇒ -3 + (n – 1) × 6 = 201 ⇒ -3 + 6n – 6 = 201 ⇒ 6n = 210 ⇒ n = 35 ∴ Total number of term is 35 |
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