Question

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

Answer 1

Hey

Here is your answer,

AP : 10,7,4...

First term , a = 10

Common difference, d = 7-10 = -3

To find : A30

Formula :
An=a+(n-1)d

Solution :
A30 = 10+(30-1)(-3)

= 10+29(-3)

=10+(-87)

=-77

Hope it helps you!

Answer 2

a30= a+(n-1)×d
a30= 10+(29)×-3

a30= 10-87
a30=-77