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Find n if the given value of x is the nth term of the given A.P.-1, -3, -5, -7, …; x = -151 |
Answer» Given A.P. -1, -3, -5, -7, …., -151 Here, a = -1 d = -3 – (-1) = -2 Last term (nth term) = -151 We know that an = a + (n – 1)d ⇒ -151 = -1 + (n-1)(-2) -151 = -1 – 2n + 2 n = 152/2 n = 76 |
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