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[" 2.If "^(n)P(7)=42*^(n)P(5)" then "n" ...

[" 2.If "^(n)P_(7)=42*^(n)P_(5)" then "n" is "(" EAMCET-199")],[[" 1) "5," 2) "7," (3) "12," 4) "9]]

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