好吧问答库 > 已知x.y.z都为整数,且x>y>z.2^x+2^y+2^z=4.625 则xyz等于?

已知x.y.z都为整数,且x>y>z.2^x+2^y+2^z=4.625 则xyz等于?

2025年04月06日 15:51
有1个网友回答
网友（1）：

二进制的计算：
4
=
2
^
2
0.625
*
2
=
1.25/////1*
2^(-1)去除个位
0.25
*
2
=
0.5/////0*2^(-2)去除个位
0.5*2=1/////1*2^(-3)去除个位；
所以
4.625
=
2^2+1*
2^(-1)+0*2^(-2)+1*2^(-3)=2^2+2^(-1)+2^(-3)
所以
x=2;y=-1;z=-3

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