(x+3)∧2+(y-5)∧2=16的圆心到原点的距离为?
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若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
圆与圆的位置关系:求圆(x-a)∧2+(y+3a)∧2=1的圆心的轨迹方程.另外:2x-4y+12=0x∧2+y∧2+2x-13=0中x,y的值.还有方程组:x∧2+y∧2-2x-5=0x∧2+y∧2+2x-4y-4=0中x,y的值
下列各题因式分解正确的是( )A.(x-y)∧2+10(y-x)+25=(x-y+5)∧2B.(x-y)∧2+10(x-y)+25=(y-x-5)∧2C.(x-y)∧2-10(y-x)+25=(x-y-5)∧2D.(x-y)∧2-10(x-y)+25=(x-y+5)∧2
[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)请帮我一下写两道计算题[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以(4x)
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
{2x的平方-(x+y)(x-y)}{(-x-y)(y-x)+2y的平方}x=根号2,y=根号3
1.(X+Y)/2【原本应是二分之X+Y的但我不会打分号】+(X-Y)/3=64(x+y)-5(x-y)=22.X+2Y=12X-3Y=2
已知(x+y)2 =2,(x-y)3 =3,求(x+y)7(x-y)2(x+y)3(y-x)4 的值
x+y分之x-y=-2,求3(x+y)分之x-y减去x-y分之2(x+y)的值
[(x+2y)²-(x+y)(3x-y)-5y²]÷(2x),其中x,y满足x²+4x+y²-y+17/4=0已知、x+y=6且xy=4(1)x²+y² (2)(x-y)² (3)x{四次方}+y{四次方}第一题没错 书上就这样写的!
y=(x∧2-x+3)/x,x属于(-∞,0)的值域
导数的计算练习题导数的计算(1)y=x^5 (2)y=sinx(3)y=1/x^3(4)y=5^√x(5)y=cosx(6)y=5^x(7)y=log3^x(8)y=lnx(9)f(x)=x^3-x^2-x+1(10)y=2x^3-3x^2+4x-1(11)y=x inx(12)y=xsinx-cosx(13)y=cosx/x(14)y=3x(x^2+2)(15)f(x)=(x-1)^2+3(x-1)(16)f(x)=1
先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0
{5(x-3y)-6=2x+1 3(x+6y)+4=9y+19 {3分之2(x-y)=4分之x+y-1 6)x+y)=4(2x-y)+16
已知2x-y=0,求分式【1+(3*y*y*y/x*x*x-y*y*y)】/【1+(2y/x-y)】的值注:x*x*x-y*y*y=(x-y)*(x*x+xy+y*y)
已知y=y(x)的导数y',y‘’存在,且y=y(x)的反函数为x=x(y),试用y',y''表示(d^2x)/dx^2 —(y'')/(y')^3
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
微分方程y’’-3y’+2y=(x+1)e∧x的特解形式为