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Home » The 9th term of an AP is 0. Prove that its 29th term is double the 19th term.
The 9th term of an AP is 0. Prove that its 29th term is double the 19th term.
RS aggarwal class 11 Maths Arithmetic progressions
The 9th term of an AP is 0. Prove that its 29th term is double the 19th term.

Given :9th term is 0
To prove: 29th term is double the 19th term
a + 8d = 0
a = – 8d
29th term is
a + 28d
⟹ 20d
19th term is
a + 18d
⟹ 10d
Hence proved 29th term is double the 19th term

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