a+2d = 9
a+11d = -7
Now solve for a and d.
Or, knowing that there are 8 terms from the 3rd to the 11th,
8d = -16
and you get d easily
now get a and let 'er rip
The 3rd term of an ap is 9 while the 11th term is -7 find the first five term of the ap
1 answer