If 19th term of a non-zero A.P.

Question

If 19th term of a non-zero A.P. is zero, then its (49th term) : (29th term) is :

Accepted Answer

a + 18d = 0        . . . . .(1)

$${{a + 48d} \over {a + 28d}} = {{ - 18d + 48d} \over { - 18d + 28d}} = {3 \over 1}$$

Solutions · 1