if the sum 3 by 1 square + 5 by 1 square + 2 square + 7 by 1 square - Maths - Sequences and Series

Question

if the sum 3 by 1 square + 5 by 1 square + 2 square + 7 by 1 square
+ 2 square + 3 square upto 20 terms is equal to K by 21

Drishti Goel · Accepted Answer

if the sum 3 by 1 square + 5 by 1 square + 2 square + 7 by 1 square + 2 square + 3 square upto 20 terms is equal to K by 21