The sum of fist m terms of an AP is ( 4m^2 - m ). If its nth term is 107, find the value of n. Also, Find the 21st term of this AP.

Home » The sum of fist m terms of an AP is ( 4m^2 – m ). If its nth term is 107, find the value of n. Also, Find the 21st term of this AP.

The sum of fist m terms of an AP is ( 4m^2 – m ). If its nth term is 107, find the value of n. Also, Find the 21st term of this AP.

The sum of fist m terms of an AP is ( 4m^2 – m ). If its nth term is 107, find the value of n. Also, Find the 21st term of this AP.

Solution:

i

Sign up now and study all subjects for free