x+y除以x-y的偏导

翟味轰3892(x+y)^5÷( - x - y)^2÷(x+y) 计算 -
胥使郑19594664343 ______[答案] (x+y)^5÷(-x-y)^2÷(x+y) =(x+y)^5÷[-(x+y)]^2÷(x+y) =(x+y)^5÷(x+y)^2÷(x+y) =(x+y)^2

翟味轰3892若(2x - y)的平方+|y+2丨=o,求代数式[(x - y)的平方+(x+y)(x - y)除以2x的值 -
胥使郑19594664343 ______ (2x-y)的平方+|y+2丨=o2x-y=0 y+2=0 x=-1 y=-2 代数式[(x-y)的平方+(x+y)(x-y)除以2x=[(x-y)^2+(x+y)(x-y)]/2x=(x-y)(x-y+x+y)/2x=(x-y)*2x/2x=x-y=-1-(-2)=1

翟味轰3892(x+y)的10次方÷( - x - y)的7次方÷(x+y)的2次方=() -
胥使郑19594664343 ______ 解 原式=(x+y)的10次方÷[-(x+y)]的7次方÷(x+y)的2次方=-(x+y)的10-7-2次方=-(x+y)=-x-y

翟味轰3892函数f(x,y)在点(x,y)处偏导数存在是f(x,y)在点(x,y)处可微分的条件 - 上...
胥使郑19594664343 ______[答案] x+y分之x-y除以(y-x) =(x-y)/(x+y)÷(y-x) =(x-y)/(x+y)*(-1)/(x-y).约分 =-1/(x+y).负x+y分之1

翟味轰3892(x+y)^5÷( - x - y)^2÷(x+y) -
胥使郑19594664343 ______ (x+y)^5÷(-x-y)^2÷(x+y)=(x+y)^5÷(x+y)^2÷(x+y)=(x+y)^(5-2-1)=(x+y)^2 很高兴为您解答,祝你学习进步!【the1900】团队为您答题.有不明白的可以追问!如果您认可我的回答.请点击下面的【选为满意回答】按钮,谢谢!如果有其他需要帮助的题目,您可以求助我.谢谢!!

翟味轰3892[(x+y)2 - (x - y)2]÷(2xy) -
胥使郑19594664343 ______ [(x+y)2-(x-y)2]÷(2xy)=(x+y+x-y)(x-y-x+y)÷2xy=4xy÷2xy=2

翟味轰38921 - [(x - y)/(x+2y)]÷[(x+y)(x - y)/(x+2y)²] 1 - [(x - y)/(x+2y)]÷[(x+y)(x - y)/(x+2y)²]= -
胥使郑19594664343 ______[答案] 1-[(x-y)/(x+2y)]÷[(x+y)(x-y)/(x+2y)²] =1-[(x-y)/(x+2y)]*[(x+2y)²/(x+y)(x-y)] =1-(x+2y)/(x+y) =(x+y-x-2y)/(x+y) =-y/(x+y)

翟味轰3892[12(x+y)的三次方 - ( - x - y)的三次方+3( - x - y)的三次方]除以( - y - x)的平方 -
胥使郑19594664343 ______ [12(x+y)的三次方-(-x-y)的三次方+3(-x-y)的三次方]除以(-y-x)的平方=[12(x+y)的三次方+ (x+y)的三次方 - 3(x+y)的三次方]除以(x+y)的平方=10(x+y)的三次方除以(x+y)的平方=10(x+y)

翟味轰3892先化简在求值:[(x - y)^2 +(x+y) (x - y)]÷2x,其中x=9,y= - 1999 -
胥使郑19594664343 ______ [(x-y)^2 +(x+y) (x-y)]÷2x=[(x-y)(x-y+x+y)]÷2x=(x-y)*2x÷2x=x-y ∵x=9,y=-1999 ∴原式=9-(-1999)=2008