Answer:
Here'd how to do problems like these. For example with #1 in your image (below)
Explanation:
The sum of the series with the general terms k + 2 from k= 1 to k= 5
All you have to do is plug in all the numbers WITHIN the interval so in this case it would be 1,2,3,4, &5. After you plug in each of those numbers into the equation, you add them up.
Like so:
(1) + 2= 3
(2) + 3= 5
(3) + 3 = 6
(4) + 3 = 7
(5) + 3 = 8
3+5+6+7+8= 30