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Class 9 Mathematics Sequences and Progressions Arithmetic ProgressionEasy

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Which is the general term of the arithmetic progression (25,20,15,10,\ldots)?

Answer and explanation

Correct answer: (a_n=30-5n)

At (n=1) it gives (25), and at (n=2) it gives (20), so (a_n=30-5n). In exams, check a decreasing rule with the first term.

Related tags

Sequences Progressions Arithmetic-Progression Class-9 Easy Arithmetic Progression Sequences And Progressions Mathematics

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