wap to print sum of series s=1+(1+2)+(1+2+3).......nth term

Question

pls write the program in c++

Answer 1

https://code.sololearn.com/ctmWTtiai0xx/?ref=app

Gotta find da wae that calculate without loop or recursive(and accuracy by any number).I need to come in drives and find the queen for this.
In that code I just improve the performance and handler as I can,my brother
Um ok It start to be dying meme :(

Answer 2

this is the program

https://code.sololearn.com/c9lr2mRM5Ihw/?ref=app