Question

the sum of the first 41 terms of an ap is 41. find the 21st term​

Answer 1

Answer:

let the 1st term is a

common difference=d

then , sum of first 41 terms

41/2{2.a+(41-1).d=41

=> 2a+40d=2

=> 2(a+20d)=2

=> a+20d=2/2=1

=> a+(21-1).d=1

21st term =a+(21-1).d

so,21st term =1