Question

how to remove '1' from 'a+1' in this sigma without introducing new variables

http://puu.sh/11wCh

Answer 1

can't u just distribute the sum
\[\sum_{a}^{b}a+\sum_{a}^{b}1=\sum_{a}^{b}a+(b-a+1)\]

Answer 2

then that becomes b+1 ?

Answer 3

how?
\[\sum_{a}^{b}=a+a+1+a+2+....b\]
assuming b>a
this isn't just a

Answer 4

i think u are misinterpreting the sigma notation... it should be a+1 + a+2 + a+3 ...

Answer 5

ok,whats the variable?? a right ?
and if not written anything,the variable starts from lower limit
here lower limit is a
so a will start from a and not a+1

Answer 6

oh ok i see, thanks

Answer 7

welcome :)