In an A.P., given a = 2, d = 8, S_n = 90, find n and a_n.

Question

KnowledgeBoat · Accepted Answer

By formula, S_n = Given, S_n = 90 Since, no. of terms cannot be negative. ∴ n = 5. By formula, a_n = a + (n - 1)d a₅ = 2 + (5 - 1) × 8 = 2 + 4 × 8 = 2 + 32 = 34. Hence, n = 5 and a_n = 34.

Mathematics

In an A.P., given a = 2, d = 8, S_n = 90, find n and a_n.

AP

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Mathematics

In an A.P., given a = 2, d = 8, Sn = 90, find n and an.

AP

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