Hellow guys, Welcome to my website, and you are watching Mathematical Induction: Prove that 1 / 1.2.3 + 1 / 2.3.4 + ... = n (n+3) / 4(n+1)(n+2). and this vIdeo is uploaded by Jatheen's Math Channel at 2014-03-10T10:32:56-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.