若|x-1|+|y+2|+|z-3|=0则(1-x)(y+2)(3-z)的值为多少
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若|x-1|+|y+2|+|z-3|=0则(1-x)(y+2)(3-z)的值为多少若|x-1|+|y+2|+|z-3|=0则(1-x)(y+2)(3-z)的值为多少若|x-1|+|y+2|+|z-3|
若|x-1|+|y+2|+|z-3|=0则(1-x)(y+2)(3-z)的值为多少
若|x-1|+|y+2|+|z-3|=0则(1-x)(y+2)(3-z)的值为多少
若|x-1|+|y+2|+|z-3|=0则(1-x)(y+2)(3-z)的值为多少
绝对值总是大于等于0的.要使3个绝对值之和为0,那只能每个绝对值都等于0,否则最后就会大于0,由此得|x+1|=0,|y+2|=0,|z-3|=0.所以x= - 1 y= - 2 z= 3 .所以
(1-x)(y+2)(3-z)= 2×0× 0 = 0
0
绝对值非负,所以只能都取0
x-1=y+2=z-3=0
(1-x)(y+2)(3-z)的值为0
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