The 9 th term of an AP is 0. Prove that its 29 th term is double the 19 th term.

Question

Philoid · Accepted Answer

Given :9^th term is 0

To prove: 29^th term is double the 19^th term

a + 8d = 0

a = - 8d

29^th term is

a + 28d

⟹ 20d

19^th term is

a + 18d

⟹ 10d

Hence proved 29^th term is double the 19^th term