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5^(2)+6^(2)+7^(2)+...+20^(2)...

5^(2)+6^(2)+7^(2)+...+20^(2)

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If x,y,z in R , then the value of determinant |((5^(x)+5^(-x))^(2) , (5^(x)-5^(-x))^(2),1),((6^(x)+6^(-x))^(2),(6^(x)-6^(-x))^(2), 1),((7^(x)+7^(-x))^(2),(7^(x)-7^(-x))^(2),1)| is

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