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If (a=12) and (d=-4), which is the correct order of the first three terms?

Answer and explanation

Correct answer: (12,8,4)

In an arithmetic progression, the first term is a, and each next term is obtained by adding the common difference d. Here, a=12 and d=-4, so the terms are 12, 12+(-4)=8, and 8+(-4)=4. Therefore, the correct order is (12,8,4). Option B uses a common difference of +4, while option C does not begin with the first term 12. Exam tip: A negative d means that the same value is subtracted from each successive term.

Related tags

Arithmetic ProgressionCommon DifferenceFirst TermsNegative Common DifferenceClass 10 MathematicsIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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