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Class 9 Mathematics Sequences and Progressions Arithmetic ProgressionExpert

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If (a_1=6) and (d=9), what is the value of (a_{16}-a_7)?

Answer and explanation

Correct answer: (81)

There are (9) gaps between (a_{16}) and (a_7), so the difference is (9\times9=81). Term differences can be found directly using (d).

Related tags

Sequences Progressions Arithmetic-Progression Difference-Of-Terms Arithmetic Progression Sequences And Progressions Mathematics Class 9 Mcq

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