已知5x-2y-2=0,求32的x次方除以4的y次方
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4^x乘以32^y=2^(2x)乘以2^(5y)=2^(2x+5y)=2^7=128
5x-4y=0;x=4y/5;x^2+y^2/x^2-y^2-x+y/x-y=(x²+y²-(x+y)²)/(x²-y²)=(x²+y
x+y=02x+1=0x=-0.5y=0.52(x+5y)=2*(-0.5+2.5)=4平方根=±2
∵|x-3|+(y-x-5)2=0,∴x−3=0y−x−5=0,解得x=3y=8.
2x+5y-3=02x+5y=3,为定值.4^(2x+5y)=4^(2x)·4^(5y)=4³=64√[4^(2x)·4^(5y)]=816^x+32^(2y)=4^(2x)+4^(5y)由
x²+y²-2x+4y+5=0配方:(x-1)²+(y+2)²=0所以只有x-1=0且y+2=0∴x=1,y=-2∴(X^4-y^4)/(2x^2+xy-y
x²+y²-2x+4y+5=0(x²-2x+1)+(y²+4y+4)=0(x-1)²+(y+2)²=0x-1=0x=1y+2=0y=-2x+
2x+5y=34^x*32^y=(2^2)^x*(2^5)^y=2^2x*2^5y=2^(2x+5y)=8735=7*7*3*5=(10^c)*(10^c)*(10^n)*(10^b)=10^(n+b
2x+5y-3=02x+5y=3(4^x)*(32^y)=2^2x*2^5y=2^(2x+5y)=2^3=8
再答:楼主你好,我感觉你写快了把题目写错了,你看一下……再问:那重新给一遍对的再答:这个就是对的再答:我改过来再写的答案
2x+5y=5原式=4^x*32^y÷4=2^2x*2^5y÷4=2^(2x+5y)÷4=2^5÷4=8
∵x²+y²-4x+2y+5=0x²-4x+4+y²+2y+1=0(x-2)²+(y+1)²=0x-2=0y+1=0∴x=2y=-14x
因为(x-y)/(x+y)=3,则(x+y)/(x-y)=1/3则5(x-y)(x+y)-(x+y)/2(x-y)=5*3-1/(3*2)=15-1/6=89/6
即(x-2y)²=0x-2y=0所以x=2y所以原式=(2x²+2xy-xy-y²)/(4x²-4xy+y²)=(2x²+xy-y²
可能题有误.若x^2+y^2-4x-2y+5=0.(x-2)^2+(y-1)^2=0x=2,y=1根号x+y除以根号下x-y为根3
已知x^2+4y^2-4x+4y+5=0求((y^4-x^4)/(y-2x)(x+y))*((2x-y)/(xy-y^2))/((x^2+y^2)/y)的值答案:x²+4y²-4x
你的题目应该是有误的.估计题目应该是问4^(x-1)÷32^y或者4^(x-1)*32^(-y).这样就简单了.4^(x-1)÷32^y=2^(2x-2)*2^(-5y)=2^(2x-5y-2)又由2
x²+4x+y²-2y+5=0x²+4x+4+y²-2y+1=0(x+2)²+(y-1)²=0所以x+2=0y-1=0则x=-2y=1所以x
x-3y=0x=3y2x+5y/3x-2y=11y/7y=11/7
2x+y+3=xy,①若x=1,则y不存在,此时5x+4y无最值;②若x≠1,则y=(2x+3)/(x-1),M=5x+4y=5x+(8x+12)/(x-1)=(5x²+3x+12)/(x-