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[" 3.In an A.P.the first term is "2" and...

[" 3.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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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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