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If a, b, c, d >0, x in R and (a^2+b^2+c^...

If `a, b, c, d >0, x in R` and `(a^2+b^2+c^2)x^2-2(ab+bc+cd)x+b^2+c^2+d^2<=0` then, `|[1,1,loga],[1,2,logb],[1,3,logc]|=`

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