Question 1172506
This was shown earlier to have a1=5 and d=2 from an=a1+d(n-1)
Sum is (n/2)(2a+(n-1)d)
=(18/2)(10+2*17)=9*44=396
the terms are
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
and add to 396.