Answer:
Step-by-step explanation:
Comment.
You need to use the addition formula when the last term is not given. Mind you, you could find it, but it is just as easy to get the answer without it.
Givens
a1 = 2
d = 3
n = 36
Formula
Sum = n(a1 + (n - 1)* d)/2
Solution
Sum = 36(2 + (36 - 1)*3 )/2 Combine the brackets
Sum = 36 (2 + 35*3 )/2
Sum = 36(2 + 105) /2 Combine the brackets
Sum = 36 * 107/2
Sum = 3852 /2
Sum = 1926
Answer
1926
