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If a(1)=8,a(2),a(3)......a(n),be an A.P....

If `a_(1)=8,a_(2),a_(3)......a_(n)`,be an A.P.If the sum of first four terms is `50` and the sum of its last four terms is `170`,then the product of its middle two terms is

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JEE MAINS PREVIOUS YEAR-JEE MAINS 2023 JAN ACTUAL PAPER-Question
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