已知x/2=y/3=z/4,求x²+2y²+3z²/xy+yz-zx对了,学的这章是分式,请用“分式”来解答,
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/08 01:59:59
![已知x/2=y/3=z/4,求x²+2y²+3z²/xy+yz-zx对了,学的这章是分式,请用“分式”来解答,](/uploads/image/z/6890758-70-8.jpg?t=%E5%B7%B2%E7%9F%A5x%2F2%3Dy%2F3%3Dz%2F4%2C%E6%B1%82x%26%23178%3B%2B2y%26%23178%3B%2B3z%26%23178%3B%2Fxy%2Byz-zx%E5%AF%B9%E4%BA%86%EF%BC%8C%E5%AD%A6%E7%9A%84%E8%BF%99%E7%AB%A0%E6%98%AF%E5%88%86%E5%BC%8F%EF%BC%8C%E8%AF%B7%E7%94%A8%E2%80%9C%E5%88%86%E5%BC%8F%E2%80%9D%E6%9D%A5%E8%A7%A3%E7%AD%94%EF%BC%8C)
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已知x/2=y/3=z/4,求x²+2y²+3z²/xy+yz-zx对了,学的这章是分式,请用“分式”来解答,
已知x/2=y/3=z/4,求x²+2y²+3z²/xy+yz-zx
对了,学的这章是分式,请用“分式”来解答,
已知x/2=y/3=z/4,求x²+2y²+3z²/xy+yz-zx对了,学的这章是分式,请用“分式”来解答,
令x/2=y/3=z/4=k,则有
x=2k,y=3k,z=4k
所以x²+2y²+3z²/xy+yz-zx
=4k²+18k²+48k²/6k²+12k²-8k²
=70k²/10k²
=7