Question

3,8,13,18 या अंकगणिती य​

Answer 1

Step-by-step explanation:

a=3, d=5, An=?

An=a+(n-1)d

An=3+(n-1)(5)

An=3+5n-5

An=-2+5n

-2=5n

n=5/-2

n=2.5