Question

Vocaloid

Answer 1

Like this @Vocaloid :O

Answer 2

"sigma" means sum

the bottom number on the sigma sign tells you the minimum x value you need to input
the top number on the sigma sign tells you the maximum x you need to input

Answer 3

in this case, input x = 1, x = 2, x = 3, and x = 4 into the expression (3x+1) and add up the results

Answer 4

Like 1 + 2 + 3 + 4

Answer 5

no, look at what is inside the sigma expression

Answer 6

take the expression 3x + 1

then let x = 1, x = 2, x = 3, x = 4 then add the expressions for 3x + 1

Answer 7

OHHHH Okie