Question

let sn denote the sum of first n terms of an AP if s2n-3sn, then s3n:sn is equal to​

Answer 1

Answer:

Not know about this.

Please Make to the answer as Brainliest.

Answer 2

Answer:

hope this helps you dear

i think this is correct my dear friend

Step-by-step explanation:

the second image is the continuation of the first image so please check it an do it correctly