Question

Having trouble with this problem.

Answer 1

that's a summation,u can solve it easily

Answer 2

$\int\∑^{113}_1=\int\∑^{112}_1  + x_{113}$

Means summation of numbers from 1 to 113 is equal to summation of numbers from 1 to 112 and sum of the term 113.

=409 + 37

=446