Ask a Teacher



find the 10th term from the end of A.P.4,9,14,...........254.

tn = a + (n-1)d
n = 10, a = 4 and d = 9 - 4 = 5
So, t10 = 4 + 9 × 5
                   = 4 + 45
                  = 49


comments powered by Disqus