Question

How do I express in summation notation these sums:
\[1^2+3^2+3^2+\dots +9^2\]

Answer 1

sorry, it was 1^2 + 2^2 + 3^2

Answer 2

\[\sum_{i=1}^{9} i^2\]

Answer 3

Could you explain me how did you do it?

Answer 4

the only thing that is changing is the number that is being squared right, no data?

Answer 5

\[{n(n+1)(2n+1)}/6\] where n=9(last term)
Standard formula for sum of sqaures

Answer 6

i don't think he is asking for the sum
he is asking how to express in summation notation

Answer 7

meverett did a great job in expressing the sum in summation notation