1.若/a/=/-4/,则a= 2.若/m-2/=0,则/m+1/= 3.若/m/+/n/=0,则m、n各等于多少4.若/m-1/+/n+2/=0,则m、n各等于几?5.若/m+2/+/n-3/+/f-4/=0,则/m/+n+f=
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![1.若/a/=/-4/,则a= 2.若/m-2/=0,则/m+1/= 3.若/m/+/n/=0,则m、n各等于多少4.若/m-1/+/n+2/=0,则m、n各等于几?5.若/m+2/+/n-3/+/f-4/=0,则/m/+n+f=](/uploads/image/z/1711255-31-5.jpg?t=1.%E8%8B%A5%2Fa%2F%3D%2F-4%2F%2C%E5%88%99a%3D+2.%E8%8B%A5%2Fm-2%2F%3D0%2C%E5%88%99%2Fm%2B1%2F%3D+3.%E8%8B%A5%2Fm%2F%2B%2Fn%2F%3D0%2C%E5%88%99m%E3%80%81n%E5%90%84%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%914.%E8%8B%A5%2Fm-1%2F%2B%2Fn%2B2%2F%3D0%2C%E5%88%99m%E3%80%81n%E5%90%84%E7%AD%89%E4%BA%8E%E5%87%A0%3F5.%E8%8B%A5%2Fm%2B2%2F%2B%2Fn-3%2F%2B%2Ff-4%2F%3D0%2C%E5%88%99%2Fm%2F%2Bn%2Bf%3D)
1.若/a/=/-4/,则a= 2.若/m-2/=0,则/m+1/= 3.若/m/+/n/=0,则m、n各等于多少4.若/m-1/+/n+2/=0,则m、n各等于几?5.若/m+2/+/n-3/+/f-4/=0,则/m/+n+f=
1.若/a/=/-4/,则a= 2.若/m-2/=0,则/m+1/= 3.若/m/+/n/=0,则m、n各等于多少
4.若/m-1/+/n+2/=0,则m、n各等于几?
5.若/m+2/+/n-3/+/f-4/=0,则/m/+n+f=
1.若/a/=/-4/,则a= 2.若/m-2/=0,则/m+1/= 3.若/m/+/n/=0,则m、n各等于多少4.若/m-1/+/n+2/=0,则m、n各等于几?5.若/m+2/+/n-3/+/f-4/=0,则/m/+n+f=
1、若/a/=/-4/,则a=±4;
(|-4|=4,绝对值为4的数有两个).
2、若/m-2/=0,则/m+1/=3;
(m=2,|m+1|=|3|=3.).
3.若/m/+/n/=0,则m=0,n=0;
(非负数和这0,各项都等于0).
4.若/m-1/+/n+2/=0,则m=1,n=-2;
(同上).
5.若/m+2/+/n-3/+/f-4/=0,则/m/+n+f=9;
(非负数和为0,则m+2=0,n-3=0,f-4=0,
∴m=-2,n=3,f=4,
∴|m|+n+f=2+3+4=9).
若/a/=/-4/,则a= 2.? 一个数或式子的绝对值是大于等于零的。当等于零时,则这个数或式子绝对值为零。