1.sqrt(81*82*83*84+1) (sqrt那个是根号)2.若|x-8y|+(4y-1)^2+sqrt(8z-3x)=0,求sqrt(2x)+y-sqrt(3z)的值3.设T=|x-p|+|x-15|+|x-p-15|,其中0<p<15,对于满足p≤x≤15的x来说,T的最小值是多少?4.设a,b是有理数,且满足
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