Question

find the 30th term of thr AP 10,7,4.....

Answer 1

given digits=10,7,4......
a1=10,a2=7
difference(d)=a2-a1
=7-10=-3
d=-3
then 30th term=a+29d
=10+29(-3)=10-87=-77

Answer 2

a=10
d=7-10=-3
a30 = a+29d =
$10 + 29 \times - 3$