Login

The 6th term of an AP is 0.Prove that its 21st term is triple its 11th term.

Kindly refer the solution of part (2) in the given link : 
https://www.meritnation.com/ask-answer/question/ap-is-0-prove-that-its-25th-term-is-triple-its-11th-t/arithmetic-progressions/3368512  

  • -3
View Full Answer

term 6th,a6=a+5d=0

a=-5d

also,a11=a+10d=-5d+10d=5d

now,a21=a+20d=-5d+20d=15d

=3*5d

=3*a11

=triple of 11th term

  • 8
What are you looking for?