vì (|..................................)=0 mà |x-2013|+2014>0;x^2+5>0 Nên 9-x^2=0=>x=3
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tap hop cac so nguyen x thoa man (|x-2013|+2014)(x^2+5)(9-x^2)=0 la S=....
GIUP VOI TRA LOI DC MIK TICK CHO
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