Question

which of the following is equivalent to

Answer 1

5\[\sum_{n=3}^{5}3n+2\]

28
30
42
54

Any help would be appreciated (:

Answer 2

So starting with n = 3...and ending when n = 5...we substitute the values in between in for 'n' and add them together!

3n + 2 ...when n = 3...we have 3(3) + 2 = 9 + 2 = 11
3n + 2 ... when n = 4...we have 3(4) + 2 = 12 + 2 = 14
3n + 2 ...when n = 5...we have 3(5) + 2 = 15 + 2 = 17

Now we add our 3 results

11 + 14 + 17 = ... ?

Answer 3

42

Answer 4

oh I see what you did. Thank you! (:

Answer 5

Good :) and you are welcome!