Question

If 18 times 18th term of an A.P.is same as 5 times 5th term,then prove that 23rd term is zero

Answer 1

Answer:

proved

Step-by-step explanation:

$18(a + 17d) = 5(a + 4d)$

$13a = - 286d$

$a = - 22d$

$a + 22d = 0$