when dealing with sigma notation, if i enclose my formula with parenthesis,does it make it different from a formula with no parenthesis? plz help, I saw this in regents prep webpage and I just didn't see any difference, but they say that the parenthesis changes the result.

Answer 1

extra parentheses are often useful when entering expressions online, as formatting is often rudimentary

The text formatting in printed material often makes the parentheses unnecessary

In any case, if the expression is unambiguous without the parentheses, they are unnecessary.

Answer 2

thanks!!!!