Question

1. If 9° term of an AP is zero, prove that its 29° term is twice ts 19" term​

Answer 1

Anshtjtbgd rhnhrnrgnyrnhtnrynrg

Answer 2

Answer:

a + 8d = 0

a = -8d

29th term = a + 28d

19th term = a + 18d

2(19th term) = a + a + 36d

                    = a + 36d - 8d

2(19th term)  = a + 28d = 29th term

LHS = RHS

Hence proved