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Which option gives the first four terms of an AP with (a_1=11) and (d=-2)?

Answer and explanation

Correct answer: (11, 9, 7, 5)

In an AP, the common difference d is added to each term to get the next term. Here d = -2, so starting from 11 gives 9, 7, and 5. Option B has a common difference of +2, so it is incorrect. Exam tip: a negative d means that the terms decrease successively.

Related tags

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

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