Question

find the 10 th term of AP 21,18,15....... is -81​

Answer 1

Answer:

I think -6

Step-by-step explanation:

An= a+(n-1)×d

A10= 21+(9)× -3 [d=a2-a1 so, 18-21=-3]

A10= 21+ (-27)

A10 = -6