已知4x方加y方减4x减6y加10等0,求(2/3乘x乘根9x+y方乘根号下x/y的立方)减(x方乘根号下1/x减5x乘根号下...已知4x方加y方减4x减6y加10等0,求(2/3乘x乘根9x+y方乘根号下x/y的立方)减(x方乘根号下1/x减5x乘
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![已知4x方加y方减4x减6y加10等0,求(2/3乘x乘根9x+y方乘根号下x/y的立方)减(x方乘根号下1/x减5x乘根号下...已知4x方加y方减4x减6y加10等0,求(2/3乘x乘根9x+y方乘根号下x/y的立方)减(x方乘根号下1/x减5x乘](/uploads/image/z/371252-20-2.jpg?t=%E5%B7%B2%E7%9F%A54x%E6%96%B9%E5%8A%A0y%E6%96%B9%E5%87%8F4x%E5%87%8F6y%E5%8A%A010%E7%AD%890%2C%E6%B1%82%282%2F3%E4%B9%98x%E4%B9%98%E6%A0%B99x%2By%E6%96%B9%E4%B9%98%E6%A0%B9%E5%8F%B7%E4%B8%8Bx%2Fy%E7%9A%84%E7%AB%8B%E6%96%B9%29%E5%87%8F%28x%E6%96%B9%E4%B9%98%E6%A0%B9%E5%8F%B7%E4%B8%8B1%2Fx%E5%87%8F5x%E4%B9%98%E6%A0%B9%E5%8F%B7%E4%B8%8B...%E5%B7%B2%E7%9F%A54x%E6%96%B9%E5%8A%A0y%E6%96%B9%E5%87%8F4x%E5%87%8F6y%E5%8A%A010%E7%AD%890%2C%E6%B1%82%282%2F3%E4%B9%98x%E4%B9%98%E6%A0%B99x%2By%E6%96%B9%E4%B9%98%E6%A0%B9%E5%8F%B7%E4%B8%8Bx%2Fy%E7%9A%84%E7%AB%8B%E6%96%B9%29%E5%87%8F%28x%E6%96%B9%E4%B9%98%E6%A0%B9%E5%8F%B7%E4%B8%8B1%2Fx%E5%87%8F5x%E4%B9%98)
已知4x方加y方减4x减6y加10等0,求(2/3乘x乘根9x+y方乘根号下x/y的立方)减(x方乘根号下1/x减5x乘根号下...已知4x方加y方减4x减6y加10等0,求(2/3乘x乘根9x+y方乘根号下x/y的立方)减(x方乘根号下1/x减5x乘
已知4x方加y方减4x减6y加10等0,求(2/3乘x乘根9x+y方乘根号下x/y的立方)减(x方乘根号下1/x减5x乘根号下...
已知4x方加y方减4x减6y加10等0,求(2/3乘x乘根9x+y方乘根号下x/y的立方)减(x方乘根号下1/x减5x乘根号下y/x)的值.
已知4x方加y方减4x减6y加10等0,求(2/3乘x乘根9x+y方乘根号下x/y的立方)减(x方乘根号下1/x减5x乘根号下...已知4x方加y方减4x减6y加10等0,求(2/3乘x乘根9x+y方乘根号下x/y的立方)减(x方乘根号下1/x减5x乘
4X^2+Y^2-4X-6Y+10=0
(4X^2-4X+1)+(Y^2-6Y+9)=0
(2X-1)^2+(Y-3)^2=0
平方大于等于0,相加等于0,若有一个大于0,则另一个小于0,不成立
所以两个都等于0
所以2X-1=0,Y-3=0
X=1/2,Y=3
[2/3X√(9X)+Y^2√(X/Y^3)]-[X^2-5X√(Y/X)]
=[1/3*√(9/2)+9*√(1/54)]-[(1/4)-5/2*√6]
=√2/2+√6/2-1/4+5/2*√6
=√2/2+3√6-1/4
去
4X²+y²-4x-6y+10=0
(2x-1)²+(y-3)²=0
x=1/2,y=3
所以
(2/3乘x乘根9x+y方乘根号下x/y的立方)减(x方乘根号下1/x减5x乘根号下y/x)
=(2/3×1/2×根号9/2+9×根号1/2/27)-(1/4*根号2-5/2×根号6)
=1/2根号2+1/2根号6-1/4根号2+5/2根号6
=1/4根号2+3根号6
4x²+y²-4x-6y+10=0
4x²+y²-4x-6y+10=(4x²-4x+1)+(y²-6y+9)=(2x-1)²+(y-3)²=0
∵(2x-1)²≥0,(y-3)²≥0
∴2x-1=0,y-3=0
∴x=0.5,y=3
下面你写的代数式很混乱没看清什么意思,你自己带入计算吧!