The 4^{\,{th }\,} term of an A.P. is 22 and ...

ICSE Class X Math 2018 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.

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