(x-1)^2 y2=1所围
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/11 18:10:09
原式=[x-y(x-y)2-y(x+y)(x+y)(x-y)]•xyy-1=(1x-y-yx-y)•xyy-1=1-yx-y•xyy-1=-xyx-y.故答案是:-xyx-y.
(x2+2x+1)-y2,=(x+1)2-y2,=(x+y+1)(x-y+1).
联立x+y−1=0x2+y2−2x−2y−6=0,得2x2-2x-7=0,设直线与圆的交点为A(x1,y1),B(x2,y2),∴x1+x2=1,y1+y2=(1-x1)+(1-x2)=1,∴直线x+
圆心到(1,0)的距离是|1-2|/√2=√2/2圆的半径是2根据勾股定理,半弦长,圆心到直线距离,和半径构成直角三角形,所以有半弦长=√[2^2-(√2/2)^2]=√14/2所以弦长=√14
(x-1)^2+(y-1)^2=1令x-1=sinay-1=cosa则x=1+sina,y=1+cosax^2+y^2=1+2sina+(sina)^2+1+2cosa+(cosa)^2=3+2(si
原式=[2(2x+y)]2-3x2-y2+2-2y2=4(2x+y)2-3(x2+y2)+2∵2x+y=7,x2+y2=5∴原式=183.
√3X-3Y+2√3=0或√3X+3Y+2√3=0过程很难写,只能把答案写上去了,其实用平几很容易算出来的
∵圆(x-1)2+y2=1的圆心为(1,0),半径为1.∴圆心到直线x+3y-2=0的距离d=|1−2|2=12,∴直线x+3y-2=0被圆(x-1)2+y2=1所截得的弦长为212−(12)2=3.
y1=y2-2/3x+1=x2/3x+x=15/3x=1x=3/5y1=y2-5-2/3x+1=x-52/3x+x=1+55/3x=6x=18/5
x^2+y^2=|x|+|y||x|^2||y|^2-|x|-|y|=0(|x|-1/2)^2+(|y|-1/2)^2=1/2x>0&y>0:(x-1/2)^2+(y-1/2)^2=1/2,这是一个以
y^2=xx-2y-3=0两式联立解得:y1=3,y2=-1,所以x1=9,x2=1取y=-1,3分别为积分上下限面积=∫(上限3下限-1)(抛物线方程-直线方程)dy=∫(上限3下限-1)(y^2-
抛物线y2=x与直线x-y-2=0方程联解,得两个图象交于点B(1,-1)和A(4,2),得所围成的图形面积为:S=∫102xdx+∫41(x−x+2)dx=92.故抛物线y2=x与直线x-y-2=0
可设x²+y²=t.则t(t-1)=2.===>t²-t-2=0.===>(t-2)(t+1)=0.===>t=2.即x²+y²=2.
解由当x=2时,y1+y2=-1得2k1+2k2=-1即k1+k2=-1/2.①当x=3时,y1-y2=12得3k1-3k2=12即k1-k2=4.②由(1)与(2)联立解得k1=7/4,k2=-9/
1.原式=(x+1)^2-y^2=(x+1+y)(x+1-y)2.公因式为(x-2)3.原式=16-(16x^2-8xy+y^2)=16-(4x-y)^2=(4+4x+y)(4-4x+y)或(-4+4
因为x²+4y²+x²y²-6xy+1=0(x²-4xy+4y²)+(x²y²-2xy+1)=0(x-2y)²
若y1=y2那么a^(2x-7)=a^(4x-1)∴2x-7=4x-1解得:x=-3∴x=-3时,y1=y2若y1>y2那么a^(2x-7)>a^(4x-1)当a>1时,y=a^x为增函数∴2x-7>
y1=y22x+1=5x+16-3x=15x=-5y1>y22x+1>5x+16-3x>15x>-5y1