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Find the number of terms in the each of the following APs: (1) 7, 13, 19, . . . ., 205 (2) 18, 15 1/2, 13, . . . . , -47 |
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Answer» Answer: n = 34 Step-by-step explanation: 1) a = 7 d = 13 - 7 = 6 last TERM = 205 Using GENERAL AP formula añ = a + (n - 1)d 205 = 7 + (n - 1)6 205 = 7 + 6N - 6 205 = 1 + 6n 204 = 6n n = 204/6 n = 34 |
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