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If x,y,z in R , then the value of determ...

If `x,y,z in R` , then the value of determinant `|{:((2^x+2^(-x))^2,(2^x-2^(-x))^2,1),((3^x+3^(-x))^2,(3^x-3^(-x))^2,1),((4^x+4^(-x))^2,(4^x-4^(-x))^2,1):}|` is equal to `"............"`

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