Question

If 4 times the 4th term of an ap is equal to 18 times it's 18th term , find its 22 term​

Answer 1

Answer:

22nd term is 0

Step-by-step explanation:

4th term = a + 3d

18th term = a + 17d

22nd term = a + 21d

$4(a + 3d) = 18(a + 17d) \\ 4a + 12d = 18a + 306d \\ 18a + 306d - 4a - 12d = 0 \\ 14a + 294d = 0 \\ 14(a + 21d) = 0 \\ a + 21d = 0$

22nd term = a + 21d = 0