Question

The sum of the first 7 terms of an arithmetic
sequence 2.5, 7.5, 12.5, 17.5, ... would be:

Answer 1

2.5 7.5 12.5 17.5 22.5 27.5 32.5

Explanation:

Just add 5 to the previous sum considering it is arithmetic sequence is always addition.

Answer 2

just google it i am not able to put the link to a website which ahs the answer to this sorry :(

Explanation: