Question

Find the sum of 1.2.3+2.3.4+3.4.5+ ……….up to n terms ?

Answer 1

find the sum of n terms: 1/1.2.3 + 1/2.3.4 + 1/3.4.5 . ... And best of luck for your preparation!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 5 years ago. shweta ramki. 22 Points. nth term=1/(n)(n+1)(n+2). equate n+1=0. implies,n=-1. substitute in n+2. -1+2 =1. similarly. equate n+2=0. implies n=-2. substitute the value of n in n+1.