Question 40302
Here's a tutor who is a bit rusty on this subject. Is there a simple expression for the following sum?

{{{sum(i^2,i=a,a+(n-1))}}}

For example,
1 + 4 + 9 + 16 + ... + 100....we find these are all squares of 1,2,3 etc..
so we say 
TN=N^2...PUT N=1,2,3, ..ETC...TO GET SUCCESSIVE TERMS..1^2=1,2^2=4,3^2=9....ETC
TO SHOW SUM WE SAY FIND SN FOR N=10..THAT IS FROM N=1 TO 10..THAT IS WHAT YOU PUT ABOVE
OFCOURSE IT IS ALSO REPRESENTED BY WHAT YOU GAVE IN THE BEGINING NAMELY 
SIGMA(N^2)...N RANGING FROM 1 TO 10 OR WHATEVER..FOR THE EXAMPLE YOU GAVE 
1+4+9+16+.....+100...TO PUT A TO A+(N-1)IS NOT CORRECT.YOU SHOULD PUT ONLY N=1 TO N=10
or
25 + 36 + 49
etc.

Thank you very much!