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an even more sophisticated way to answer would be to use absolute values, but enough already

did you get an answer to that series with the squares? that bedevilled me for a while

the series with squares? which one..i don't even remember..lol

\[x+2^2x^2+3^2x^3+4^2x^4+...\]

or maybe it started with 1, i don't remember but i could not figure out how to get that square there

i think the series is e^x expansion and minus first two term....lol right?

maybe a bi-polar professor?

i don't know ..i'm taking an online calculus...it's really frustrate me