(x-y)的7次方除以(y-x)的6次方-搜答案-智慧作业帮

（x-y）的7次方除以（y-x）的6次方+（-x-y)的3次方除以（x+y)的2次方=(x-y)的7次方÷(x-y)的6次方-(x+y)³÷(x+y)²=x-y-(x+y)=-2y

(x-y)^7/(y-x)^6+(-x-y)^3/(x+y)^2=x-y-x-y=-2y

(x-y)(z+y-x+y+2y)÷4y=(x-y)(z-x+4y)÷4y{(x+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y=(x-y)(x+y-x+y+2y)÷4y=(x-y)(4

把（-x-y)7次方提个负号出来就是-（x+y）7此方所以答案是-（x+y）

(x-y)的平方除以(x-y)的6次方=1/(x-y)的4次方

(x^2*y）^4/（x^2*y)+(x^2*y)^3=(x^2*y）^3+(x^2*y)^3=2(x^2*y）^3=2x^6*y^3

若X>1,y>0,且满足xy=x^y,x/y=x^(3y)相乘得x2=x^(4y)y=0.50.5x=根号x0.25x2=xx=4x+y=4.5

原式=(x-y)的7次方÷(x-y)的6次方-(x+y)的3次方÷(x+y)的2次方=(x-y)的7-6次方-(x+y)的3-2次方=(x-y)-(x+y)=x-y-x-y=-2y

x+y

（2x的2次方y）的3次方除以6x的3次方y的2次方=8x的6次方y的3次方除以6x的3次方y的2次方=4/3x³y如追加其它问题,

原式=[2x/(x-y)]*[y/(x+y)]-[x^4/(x^4-y^4)]/[x^2/(x^2+y^2)]^2=2xy/(x^2-y^2)-(x^2+y^2)^2/[(x^2+y^2)(x^2-y

计算：x-y分之x×x+y分之y的平方-x的4次方-y的4次方分之x的4次方y除以x的平方+y的平方分之x的平方=x/x-y分之x×y^2/x+y-x^4y/(x^4-y^4)*(x^2+y^2)/x

原式=[x^2+4xy+4y^2-x^2+y^2-7y^2]/2y=[4xy-2y^2]/2y=2x-y代入x=-1,y=-2原式=-2-（-2）=0

原式=[(x-y)(x-y)+(x+y)(x-y)]/2x=(x-y)(x-y+x+y)/2x=(x-y)·2x/2x=x-y=3-1.5=1.5

原式=(x-y)^3*(y-x)^4/(y-x)^3/(x-y)=(x-y)^7/(x-y)^3/(x-y)=(x-y)^4/(x-y)=(x-y)^3

（x-y)的十次方除以（y-x)的五次方除以（x-y）=(x-y)^10÷(y-x)^5÷(x-y)=(x-y)^10÷[-(x-y)^5]÷(x-y)=-(x-y)^5÷(x-y)=-(x-y)^4

[x-2y]4次方除以[2y-x]的二次方除以[x-2y]=[x-2y]4次方除以[x-2y]的二次方除以[x-2y]=x-2y

=(x-y)³-2(x-y)³+3(x-y)³=2(x-y)³

(x一Y）的5次方除以（X一Y）的3次方=（X一Y）的2次方

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