若 x/2=y/3=z/4 求 xy+yz+xz / x²+y²+z² 的值给算式
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若x/2=y/3=z/4求xy+yz+xz/x²+y²+z²的值给算式若x/2=y/3=z/4求xy+yz+xz/x²+y²+z²的值给算式
若 x/2=y/3=z/4 求 xy+yz+xz / x²+y²+z² 的值给算式
若 x/2=y/3=z/4 求 xy+yz+xz / x²+y²+z² 的值
给算式
若 x/2=y/3=z/4 求 xy+yz+xz / x²+y²+z² 的值给算式
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