in any PMI question if we r asked to find the n terms how do we find it - Maths - Principle of Mathematical Induction

Question

in any PMI question if we r asked to find the n terms how do we
find it ???
eg a+b+c to n terms = z
how do we find n terms pls tell me

use the following example to help me out

eg 1/1 4 +1/4 7 +1/7 10 to n terms = n/3n+1
[ans nth term is 1/(3n-2)( 3n+1 )]

please help me out

Shilpa Patel · Accepted Answer

in any PMI question if we r asked to find the n terms how do we find it ??? eg. a+b+c........... to n terms = z how do we find n terms pls tell me use the following example to help me out eg.1/1.4 +1/4.7 +1/7.10....... to n terms = n/3n+1 [ans. nth term is 1/(3n-2)( 3n+1 )] please help me out .....