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Deepak Bora

Asked: August 12, 2020In: CBSE, ICSE

The sum of the first 9 terms of an AP is 81 and the sum of its first 20 term is 400. Find the first term and the common difference of the AP.

In this Question the sum of first two n terms of the AP is given. You have to find the first term and common difference of the AP. This is the Important question based on Arithmetic progression Chapter of R.S ...

Deepak Bora

Asked: August 2, 2020In: CBSE, ICSE

The first and last term of an AP are a and l respectively. Show that the sum of the nth term from the beginning and the nth term from the end is (a+l)

ICSE & CBSE Board Question Based on Arithmetic Progression of RS Aggarwal Here the First and last term of an AP is given. You have to show that the sum of AP from the beginning and ending nth term is ...

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The sum of the first 9 terms of an AP is 81 and the sum of its first 20 term is 400. Find the first term and the common difference of the AP.

The first and last term of an AP are a and l respectively. Show that the sum of the nth term from the beginning and the nth term from the end is (a+l)