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

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In an arithmetic progression, the difference between the fifth and first terms is (-20). What is the common difference?

Answer and explanation

Correct answer: (-5)

From the first to the fifth term there are (4) gaps, so (4d=-20) and (d=-5). In a decreasing progression, (d) is negative.

Related tags

Ap Negative D Term Gap Hard Introduction To Aps And Common Difference.Introduction To Aps And Common Difference Arithmetic Progressions (Ap)Arithmetic Progressions Ap

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