Question

Find n and a if Añ = 4, d = 2, Sn= -14 ​

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

If you think this answer is right then please like.