Sequence and series

FInd The sum of the series up to n terms : 1^2 +(1^2+2^2)+(1^2+2^2+3^2)+........

[@royal916]

Dai double integrals ko ni video banaunu na

[@mysecondclass4405]

Particular question or whole chapter

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@@mysecondclass4405 concept video and some imp questions for board examination

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@@royal916 please mail me