Find the sum of first 20 terms of an A.P. ...

CBSE Class 10 Math 2022 Delhi Set 1 Paper (Term II)

Question : 6 of 14

Marks: +1, -0

Find the sum of first 20 terms of an A.P. whose

n^{\;\text{th }\;}

term is given as

a_{n}=5-2n

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