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In an A.P., the first term is 2 and the ...

In an A.P., the first term is 2 and the sum of the first five terms is one-fourth of the next five terms. Show that 20th term is -112.

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In an A.P.,the first term is 2 and the sum of the first five terms is one-fourth of the next five terms.Show that 20 th term is -112

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