Question

find the 11th last term of an ap is 27, 23, 19. .-65.

Answer 1

l-(n-1)d
-65-(11-1)-4
-64-(-44+4)
-64+44-4
-25 is the required answer

Answer 2

AP = -65,-61.......19,23,27
a=(-65)
d=4
an=a+(n-1)d
a11=(-65)+(11-1)4
all=(-65)+40
a11=(-25)