Answers

The Brainliest Answer!
2015-12-30T12:43:17+05:30
Here a= -15
d=t2-t1=-18-(-15)=-3

tn=a+(n-1)d
=-15+(n-1)(-3)
=-15-3n+3
=-12-3n
ans tn= -12-3n
2 4 2