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(x%y)2+(8x^3y^3%4x^2y^4)

解:∵4x^2y^2dx+2(x^3y-1)dy=0 ==>[4x^2y^(3/2)dx+2x^3y^(1/2)dy]-2y^(-1/2)dy=0 (等式两端同乘y^(-1/2)) ==>(4/3)d(x^3y^(3/2))-4d(y^(1/2))=0 ==>d(x^3y^(3/2))-3d(y^(1/2))=0 (等式两端同乘3/4) ==>∫d(x^3y^(3/2))-∫3d(y^(1/2))=0 ==>x^3y^(3...

-4x^2y-8xy^2+2x^2y-3xy^2 =-2x²y-11xy² =-xy(2x+11y) 3x^2-1-2x-5+3x-x^2 =2x²+x-6 =(2x-3)(x+2) -0.8a^2b-6ab-1.2a^b+5ab+a^2b =-a²b-ab =-ab(a+1) 5yx-3x^2y-7xy^2+6xy-12xy+7xy^2+8x^2y =-xy+5x²y =xy(5x-1) 求代...

我觉得的话(x2y3-xy)dy/dx=1化为(x2y3-xy)dy=dx,即1/4x2dy^4-1/2xdy^2=dx,对两边同时积分,得x=1/4x2y^4-1/2xy^2+c,

如果 ^表示 乘积的话, 1. 108c - 6 2. 3/2y + 1 3. -96

4x+8y

(1)按y次数逐渐升高顺序排列 -4x^2y-y^2+5x^3y^3-6xy^4-6 (2)按x次数逐渐降低顺序排列(降幂排列) 5x^3y^3-4x^2y-6xy^4-y^2-6 (3)这是6次5项式

ax(3x-4x^2y+by^2)=bx^2-8x^3y+abxy^2 3ax^2-4ax^3y+abxy^2=bx^2-8x^3y+abxy^2 恒成立 所以 3a=b -4a=-8 所以a=2 b=6 (2) (x^2+ax-1)(-bx^3) =-bx^5-abx^4+bx^3不含x^4项,且有x^5项 所以 ab=0 b≠0 所以a=0 如果你认可我的回答,请点击“采纳为...

解:∵ (3x^2y+8xy^2)dx+(x^3+8x^2y+12ye^3)dy =(3x^2ydx+x^3dy)+(8xy^2dx+8x^2ydy)+12ye^3dy =(yd(x^3)+x^3dy)+4(y^2d(x^2)+x^2d(y^2))+6e^3d(y^2) =d(x^3y)+4d(x^2y^2)+6e^3d(y^2) =d(x^3y+4x^2y^2+6e^3y^2) ∴(3x^2y+8xy^2)dx+(x^3+8x^2y+12ye^...

2x^2+3y^2=x^2+4y^2+4xy=(x+2y)^2 (x+2y)^2

解:由(x-2y-2分之1)的2次方+(xy-2)的2次方=0 且(x-2y-2分之1)的2次方≥0,(xy-2)的2次方≥0 得x-2y-2分之1=0,xy-2=0 x-2y=2分之1,xy=2 则x的3次方y-4x的2次方y的2次方+4xy的3次方 =xy×(x的2次方-4xy+4y的2次方) =xy×(x-2y)的2次方 ...

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