Question

find n given a=first term = 18.9 d = common difference = 2.5 an= the nth term = 3.6, n=?
​

Answer 1

Answer:

Here, a=−18.9,d=2.5 and an=3.6.

Therefore, an=a+(n−1)d

−18.9+(n−1)×2.5=3.6

⇒(n−1)×2.5=22.5

⇒n−1=9

∴n=10

Answer 2

Answer:

highest rated this group hgca class 6