Question

The ratio of 21st and 29th term of an ap is in a ratio 2:1. What is the 37th term of the ap

Answer 1

Answer:

Step-by-step explanation:

a21/a29=2/1

a+20d/a+28d=2/1

a+20d=2(a+28d)

a+20d=2a+56d

20d-56d=2a-a

-36d=a.....…..................…................(1)

an=a+(n-1)d

a37=-36d+(37-1)d

=-36d+36d

=0

Answer 2

Answer:Step-by-step explanation:

a21/a29=2/1

a+20d/a+28d=2/1

a+20d=2(a+28d)

a+20d=2a+56d

20d-56d=2a-a

-36d=a.....…..................…................(1)

an=a+(n-1)d

a37=-36d+(37-1)d

=-36d+36d

=0