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Check whether -150 is a term of the A.P: 11, 8, 5, 2, ……….. |
Answer» 11, 8, 5, 2, ……….. -150 a = 11, d = 8 11 = -3. an = -150. a + (n – 1) d = an 11 + (n – 1) (-3) = -150 11 – 3n + 3 = -150 -3n + 14 = -150 -3n = -150 – 14 -3n = -164 3n = 164 ∴ n = \(\frac{164}{3}\) Here value of ‘n’ is not perfect. Hence -150 is not a term of the A.P. |
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