How many terms of the A.P. 25, 22, 19, … are needed to give the sum 116

(i) How many terms of the A.P. 25, 22, 19, … are needed to give the sum 116? Also, find the last term.
(ii) How many terms of the A.P. 24, 21, 18, … must be taken so that the sum is 78? Explain the double answer.

Solution:

ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 9 Arithmetic and Geometric Progressions Ex 9.3

ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 9 Arithmetic and Geometric Progressions Ex 9.3

ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 9 Arithmetic and Geometric Progressions Ex 9.3

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