x^2y (x^3 y^3)当x,y都趋近于0的时候,极限是多少
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![x^2y (x^3 y^3)当x,y都趋近于0的时候,极限是多少](/uploads/image/f/898009-25-9.jpg?t=x%5E2y+%28x%5E3+y%5E3%29%E5%BD%93x%2Cy%E9%83%BD%E8%B6%8B%E8%BF%91%E4%BA%8E0%E7%9A%84%E6%97%B6%E5%80%99%2C%E6%9E%81%E9%99%90%E6%98%AF%E5%A4%9A%E5%B0%91)
写清楚点点比如说前面是X/X还是X/(X-Y)打上括号分段这样才能清楚的做
后面那个x-y分之2{x+y}-3{x+y}分之x-y是怎么回事,能清楚一点吗前一个化简得x=-3y;后一个得(-4y/-4y)-4y/6y=1-2/3=1/3
3-2M>0M
原式=1/2×2x-y/x+y+2x-y/6x-3y=1/2+1/3=5/6
(2x-y)/(x+y)=3所以(x+y)/(2x-y)=1/3原式=1/2*(2x-y)/(x+y)+1/3*(x+y)/(2x-y)=3/2+1/9=29/18
因为X+2/X-Y=2所以X=2Y+2将X=2Y+2代入X+Y/3(X-Y)-(X-Y)/2(X+Y)=(3Y+2)/3(2Y+2-Y)-(2Y+2-Y)/2(3Y+2)接下来自己算
(x+y)(x+y)^2(-x-y)^3=-(x+y)^6
3x^2(x-y)+6x(y-x)=3x^2(x-y)-6x(x-y)=(x-y)(3x^2-6x)=3x(x-y)(x-2)
原试=-y-y-y.-y大概有50个-y所以答案是-50/3
X+Y分之X-Y等于3x=-2yX+Y分之2(x-y)减X+Y分之3X+Y=(-x-3y)/(x+y)=1
(x-y)^5*(y-x)^3*(x-y)^2=-(x-y)^5*(x-y)^3*(x-y)^2=-(x-y)^(5+3+2)=-(x-y)^10
(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方=x²-2xy-3y²-x²+4y²-x²+2xy-y²=(x²-
=(x-y)[(3x+y)-(2x+3y)]*(x-y)=(x-y)*(x-y)(3x+y-2x-3y)=(x-y)(x-y)(x-2y)到底是化简,还是?=(x*x-2xy+y*y)(x-2y)=x
2x-y\x+y=32x-y=3(x+y)2x-y=3x+3y3x-2x=-y-3yx=-4y2x-y/2x+2y+x+y/6x-3y=(-8y-y)/(-8y+2y)+(-4y+y)/(-24y-3
1.(x+y)/(x-2y)=3x+y=3x-6y2x=7y2x/y=7y/y=72.16的(2-x)次方=8的(x+5)次方【16=2的4次方,8=2的3次方】2的4(2-x)次方=2的3(x+5)
=(x-(x+y))+((x+2y)-(x+3y))+...+((x+98y)-(x+99y))=-y*50=2*50=100
解题思路:根据题意,由整式的运算的知识整理,分析可以求得解题过程:
解代数式得:-3x的平方y-2y的三次方因为1/2的平方=-1/2的平方,所以结果仍正确给分吧!嘿嘿!
题目应该是y=(3m-2)/x吧当x0m>2/3
Y的取值范围:(0,1)