Can someone please help me ASAP? I can only take this once
There is only 5 terms ( i = 1 2 3 4 5 ), so let's just expand it out
3 (1) + 3 (2) + 3 (3) + 3 (4) + 3 (5) = You can do the rest !
so the answer would be 45?
yes.....