If the 10th term of the sequence a, a – b , a – 2b , a

Question

If the 10^th term of the sequence a, a – b , a – 2b , a – 3b, ….. Is 20 and its 20^th term is 10, then fine its x^th term.

Options:

A . 10 – X

B . 20 – X

C . 30 – X

D . 40 – X

Answer: Option C

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