高数求y=IntanX÷5的导数
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x-y=4x5=20①2x+y=5②2x-3y=18③①+②3x=25x=25/3y=-35/3代入③2x-3y=50/3+105/3=155/3≠18题目错误
[(x+2y)^2-(x+y)(3x-y)-5y^2]/2x=(x^2+4xy+4y^2-3x^2-3xy+xy+y^2-5y^2)/2x=(-2x^2+2xy)/2x=-x+y=2+1/2=二分之五
[(x+y)²-(x-y)²-2y(x-y)]÷5y=[X²+2XY+Y²-X²+2XY-Y²-2XY+2Y²]÷5Y=[2Y(X
=-(x+y)-3/5=-5-3/5=-5.6
[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷8x=(9x^2-4y^2-5x^2+2xy-10xy+4y^2)/(8x)=(4x^2-8xy)/(8x)=(x-2y)/2=2012/
a^x(lna).
【(x+2y)²-(x+y)(3x-y)-5y²】÷2x=y-x=0.5+2=2.5
原式=(9x²-4y²-5x²-8xy+4y²)÷4x=(4x²-8xy)÷4x=x-2y=2011
前面的函数是不是给错了都不是一个等式再问:Y=X^3*2^X的导函数Y'=再答:Y'=3x^2*2^x+x^3*2^x*ln2
x+4y-2x+8y+5=0,(x-1)+(2y+2)=0∵(x-1)≥0,(2y+2)≥0∴(x-1)=0,(2y+2)=0x=1,y=-1代入x^4-y^4/2x+xy-y·2x-y/xy-y÷(
令p=y'则y"=pdp/dy代入原式:pdp/dy+p=pydp/dy+1=ydp=(y-1)dy积分:p=(y-1)²/2+c1即dy/dx=(y-1)²/2+c12dy/[(
lny=sinxlnx对x求导(1/y)*y'=cosx*lnx+sinx*1/xy=x^sinx所以y'=x^sinx*(cosx*lnx+sinx/x)
我用x2表示的x的平方1,(x-y)2=x2-2xy+y2,(x+y)(x-y)=x2-y2,所以原式=(2x2-2xy)/2x=x-y=12,=xy+y2+x2-y2-x2=xy=-13,=x2-x
x²+y²=19(x+y)²=x²+y²+2xy=25xy=3(x-y)*(x-y)=(x-y)²=x²+y²-2xy=
特征方程a^2+2a+5=0有共轭复根-1+2i,-1-2i所以通解为y=e^(-x)(C1cos2x+C2sin2x)再问:C1��ʲô再问:�������e��-x��再问:�躯��xe��sin
解(x-y)(x+y)-(x-2y)²+x(3x-5y)-(x-y)(x-2y)=(x²-y²)-(x²-4xy+4y²)+(3x²-5xy
x=1/2(4+5y)原式=4^1/2(4+5y)÷32^y=2^(4+5y)÷32^y=16*2^5y÷32^y=16
再答:再答:看后面这个图再答:不懂可以问我
(x/y-y/x)÷(x/y+y/x-2)÷(1+y/x)=(x²-y²)/xy÷(x²+y²-2xy)/xy÷(x+y)/x=(x+y)(x-y)/xy÷(x
【(x+2y)2-(x+y)(3x-y)-5y2】÷(2x)=[x^2+4xy+y^2-(3x^2+2xy-y^2)-5y^2]/(2x)=[-2x^2+2xy]/(2x)=y-x=1/2-2=-3/