If Sn denotes the sum of first n terms of an AP, prove that S12 = 3(S8 – S4). If Sn denotes the sum of first n terms of an AP prove that S12 = 3(S8 – S4). November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related