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Class 10 Mathematics Arithmetic Progressions (AP)Introduction to APs and common difference.Expert

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In an AP, (a_2+a_4=30) and (a_3=15). What is certain about the common difference?

Answer and explanation

Correct answer: (d) cannot be determined

In an AP, (a_2+a_4=2a_3) is automatically true, so (d) is not found. In exams, check whether the information is new or just an identity.

Related tags

Ap Conceptual Insufficient Information Introduction To Aps And Common Difference.Introduction To Aps And Common Difference Arithmetic Progressions (Ap)Arithmetic Progressions Ap Mathematics

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