y=3x^3 7x^248x 49,y有同样的余数当被除以x+k或x-k,求y
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/06 15:35:41
无解,题目错了
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
(3xy)平方/(-xy)+(x-2y)平方-(x+2y)(x-2y)=-9xy+(x-2y)(x-2y-x-2y)=-9xy+(x-2y)(-4y)=-9xy-4xy+8y²=8y
(x+y)(x+y)^2(-x-y)^3=-(x+y)^6
y=3x2+6x2+1=3(x2+1)+6x2+1−3≥23(x2+1)•6x2+1-3=62-3,当且仅当3(x2+1)=6x2+1时取等号,∴函数y=3x2+6x2+1的最小值是62-3.故答案为
3x^2(x-y)+6x(y-x)=3x^2(x-y)-6x(x-y)=(x-y)(3x^2-6x)=3x(x-y)(x-2)
(y-x)(x-y)^3(y-x)^5=(y-x)[-(y-x)^3](y-x)^5=-(y-x)^(1+3+5)=-(y-x)^9=(x-y)^9
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
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
(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
绝对值加平方=0因为两者均大于等于0所以都是0|x+y+2|=0(2x+3y+5)²=0x+y=-22x+3y=-5x=-1y=-1有什么不明白可以继续问,随时在线等.
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!
∵x−x+1=y+3−y,∴x+y=x+1+y+3≤2x+y+42则(x+y)2≤2(x+y+4)解得:-2≤x+y≤4∴x+y的最大值为4故答案为:4
x-5y=13(1)3x+y=20(2)(1)+(2)*5x-5y+15x+5y=13+10016x=113x=113/16y=20-3x=-19/16
①×2-②得,-7y=5,解得y=-57,代入①得,x-3×(-57)=5,解得x=207.故原方程组的解为x=207y=−57.再问:非常感谢
3x+2y=m+1①4x+y=m②①-②×2得:-5x=-m+1,解得:x=m−15,①×4-②×3得:5y=m+1,解得:y=m+15,即方程组的解是x=m−15y=m+15,∵关于x、y的方程组3
由题意得,x+3≥0,解得x≥-3.故答案为:x≥-3.