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

Asked by ahonasarkar02 | 10th Jul, 2018, 10:32: PM

Expert Answer:

4, 9, 14........., 254
a = 4 and d = 5
tn = 254
a + (n - 1)d = 254
4 + (n - 1) × 5 = 254
5(n - 1) = 250
n - 1 = 50
n = 51 
Hence, 10th term from the end is t42
t42  = a + (42 - 1)d
t42 = 4 + 41 × 5 = 209

Answered by Sneha shidid | 11th Jul, 2018, 10:32: AM