Question

The eighth term of an A.P,is zero.prove that it's 38th term is triple of its 18th term.

Answer 1

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Answer 2

Answer:

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Step-by-step explanation:

Nth term= a+(n-1)d

8th term=0

a+(8-1)d=0

a+7d=0

a=-7d

38th term=-7d+37d=30d

18th term=-7d+17d=10d

From the above two equations

We can say 18th term= 38th term