ICSE Class X Math 2018 Solved Paper

Question : 31 of 32

Marks: +1, -0

The

4^{\;\text "th "\;}

term of an A.P. is 22 and

15^{\;\text "th "\;}

term is 66 . Find the first term and the common difference. Hence find the sum of the series to 8 terms.

Solution:

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