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Find n if the given value of x is the nth term of the given A.P.25, 50, 75, 100, ; x = 1000 |
Answer» Given A.P. 25, 50, 75, 100, …… ,1000 Here, a = 25 d = 50 – 25 = 25 Last term (nth term) = 1000 We know that an = a + (n – 1)d ⇒ 1000 = 25 + (n-1)25 1000 = 25 + 25n – 25 n = 1000/25 n = 40 |
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