Question

A.P. : 3, 8, 13, 18, ... का कौन-सा पद 78 है?
INCERT E​

Answer 1

Answer:

here a=3

d=8-3=5

let Tn=78

a+(n-1)d=78

put the value of a and d

3+(n-1)5=78

+5n-5=78

5n-2=78

5n=80

n=16

16th term is 78