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In the sequence (0,-3,-6,-9,\ldots), what are (a) and (d) respectively?

Answer and explanation

Correct answer: \(a=0,\ d=-3\)

In an AP, \(a\) is the first term, so \(a=0\). The common difference \(d\) is the difference between consecutive terms: \(d=-3-0=-3\). Hence, \(a=0,\ d=-3\) is correct. In option A, the sign of the common difference is incorrect. Exam tip: use \(d=a_2-a_1\), subtracting the first term from the second term.

Related tags

Arithmetic ProgressionFirst TermCommon DifferenceNegative IntegersClass 10 MathematicsIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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