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

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If (d) is to be found in (28,21,14,7,\ldots), which calculation is correct?

Answer and explanation

Correct answer: (21-28=-7)

The common difference is next term minus previous term, so (21-28=-7). In a decreasing sequence the order of subtraction is very important.

Related tags

Ap Correct Calculation Negative D Medium Introduction To Aps And Common Difference.Introduction To Aps And Common Difference Arithmetic Progressions (Ap)Arithmetic Progressions Ap

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