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(2002•哈尔滨)解方程:-8x2+12=0
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(2002•哈尔滨)解方程:
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACMAAAAqCAYAAAA51uKRAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAGFSURBVFhH7ViJDcMgDGQydmIdL9AxPAqjuDZf
cUjaqFgqqogURZUSOM53h6mjhS63EBb6MzARyDtPEOc5nmMGAznn+F4BTCIDKWwwp7LYzFy5ZTOz
OjMp8CRn8h1wLvjmQm9u7uHrDeaK0LWYqeL79VPYWosZY0NMDbeZMXZTJPA1eQO3VzbXV2WKEFrP
i4FBeSCDFtjATWl/smHnK2Z0UaSfWQUMMxMszikWoYdgo5fpBI7gp3uYvuRZM+0wxs642SEJEN/K
gwR3S/VmLkfihgqgdG6vSc7zI9m56/DunyhZ7G2xInzdHbqIqDJCVmyVG8NSYlRzyaL6QozWFhpL
iCVgjL4yZRlwaeyDJAYwWgu8Nikdg0MzsXZbyXswXMch2vPHn3SUfXDUUvf7aIwTfSpmMJwn6bG2
NtuikK5L1cBcZwbb1o/1NQEk+uwYazmjysAv1XcSW0U3kZ9g1S+wr2SRfTy56hidG4EexUkZVBHd
ZKug5xr/7TLYtU0KlgbZYK64fAKTWob8aoLgHwAAAABJRU5ErkJggg==
)
-8x
2+12=0
相关试题
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(2002•哈尔滨)解方程:
-8x2+12=0
-
(2002•哈尔滨)解方程:
-8x2+12=0
-
(2002•哈尔滨)解方程:
-8x2+12=0
-
(2002•哈尔滨)解方程:
-8x2+12=0
-
(2002•哈尔滨)解方程:
-8x2+12=0
-
(2002•哈尔滨)解方程:
-8x2+12=0
-
(2002•朝阳区)用换元法解方程
-8x2+12=0,下列换元过程中,原方程变形不正确的是( )
A.设
,则![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAjCAYAAADWtVmPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAGCSURBVFhH7VhRlsIgDORk3CnX4TIchaNkAynb
VNe2lqGIb/H5oU8ShplMUh1/yXJfgoP/gewzmTh4xxTv47sLIyl4dm52ICkwhTg7IyIpCpzkNbW0
InkOKdfFzEAimeKeGEgkVwr88e2Vou6ri2vNLa3NnU8sra12egLR2EXCPjukrk7S2i+Jv2rp1XeP
kXIt1rorjXcZH4YAuV75kclVi89R1s/u120MTSxWamm7nhi88+lcq4SVERkr/AapYA2qv1e2WqRw
51RYjilSshe+NN4stUVaz5SFk/5/Vu+Wm7N78u/sOglknVaTsBHBqoCEO5SWnY3K9FpNDZIeF6SU
AJlLNsWuWbRovDBBGw3izoCKdGi/WtQWLSo1Os5BQ6wuhU57Vzw34iGoBzhxONsp30/xKQ0VM6Ls
NNT3r+baDgwQM/PoMeTPh5stHAhkbEMFATHPH4MaKhTIyIYKAlKn5HENFQdkGfuveU77rmYgn9JQ
m4G0NtR2LjRCMxDUQVrj/AAQsPOLOw4kOwAAAABJRU5ErkJggg==
)
B.设2x2-3=y,则![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADsAAAAjCAYAAAAqoHJFAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.设8x2-12=y,则![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADMAAAAjCAYAAAA5dzKxAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAGGSURBVFhH7VdRssMgCPRk3snreBmP4lF4gGkl
viRPG9QxfXb60YxDWFh2qYEHHfMgLPANYCJ4a8CFtfp22JnoLRjzBDDRg/PhCZ1BejkPET/L0yw4
Cz7SnKwOJjgx8IuDCc7w0Jdfm1q1xDnxmcU7sy/9P5iBVEzF5pGwpL7pTFtnjubz7FlZJZrv1yyz
wW+ryjQwn7cxgDMvC6Eo+bc6mLcqivYDyr6kw+dAKPcyVp7vJjBn8s30kFsprkR2Vz3MwWdu3wHD
tJKF2gyeaId5HPtL+bwtgd9U8IVf1b6X7slzCaYtydrbBCZv3RG7ovZvQotmtVB2ux1v4YpbBFPY
ieJ0FIAEOA2lxY64Hb/ry3F1c7g0J7GQFdQBIos1zDS11KulBE3SfBmYuMyUmrfXGTWTI5VhmZfu
3FLX+3dTZzqa3P0U6yNsNPvb5OpDzrspwHQyuYHYNjBiaLVNbhaYXiY3Cs9bmvua3Bg4GYzSij4m
7eO3mJkmpw0cfW6eyamD0Q44M94PvWZ417Arc0AAAAAASUVORK5CYII=
)
D.设
,则y-
-
(2002•朝阳区)用换元法解方程
-8x2+12=0,下列换元过程中,原方程变形不正确的是( )
A.设
,则![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAjCAYAAADWtVmPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAGCSURBVFhH7VhRlsIgDORk3CnX4TIchaNkAynb
VNe2lqGIb/H5oU8ShplMUh1/yXJfgoP/gewzmTh4xxTv47sLIyl4dm52ICkwhTg7IyIpCpzkNbW0
InkOKdfFzEAimeKeGEgkVwr88e2Vou6ri2vNLa3NnU8sra12egLR2EXCPjukrk7S2i+Jv2rp1XeP
kXIt1rorjXcZH4YAuV75kclVi89R1s/u120MTSxWamm7nhi88+lcq4SVERkr/AapYA2qv1e2WqRw
51RYjilSshe+NN4stUVaz5SFk/5/Vu+Wm7N78u/sOglknVaTsBHBqoCEO5SWnY3K9FpNDZIeF6SU
AJlLNsWuWbRovDBBGw3izoCKdGi/WtQWLSo1Os5BQ6wuhU57Vzw34iGoBzhxONsp30/xKQ0VM6Ls
NNT3r+baDgwQM/PoMeTPh5stHAhkbEMFATHPH4MaKhTIyIYKAlKn5HENFQdkGfuveU77rmYgn9JQ
m4G0NtR2LjRCMxDUQVrj/AAQsPOLOw4kOwAAAABJRU5ErkJggg==
)
B.设2x2-3=y,则![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADsAAAAjCAYAAAAqoHJFAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAGqSURBVGhD7VmLEYMgDGUydmIdlmEURkkDiEQF
C5WIVb3z+jmEvLyXXyvgQZd4EFZ4OFirQQoJ2t6P8yWzRoEQAu8ngPVkGlAv2P+XdSZBvcz+P62I
4GX2TVA3EPJSxr6hcHU23MocRWhByx77tNoRzvU4pIbYH7G2i1bLn50WHV7zunaFUQLk1AJ6GybW
+MCiSpQ2A5hdl870mQksykg5+Wxl7Ly+lhe4NpXIrVW0i/WbvZINTWBnQ0lczzIjAW5U7K0LMZsZ
NoxOsXUErJftwnHBBidrtDUlpL331QagZxPuUoLaSk2vxqxau9w6eu2CrQZRubDEfkwYYRsHNmVp
i6weTvzRvl4yrsRLlpWYJd/7RNZxePYhoojz2BNUxLsPViKjqldiIi4+v/T4w8tNRZA7ZaBdN+Un
BjQVe+b3yr4tLmoqPS0bb9a6WPKSHdVC4ojHXuRplhz8+1ZglrHIH1JD54cnGX8v8p3PHbIdActU
5IfAyh86gWUs8lcFy1Xkr4J3Lj28Rf4acBPYTiPWNWAVYnZkkT/bMTgO3vNPrJwjz2sXz6Yxc94H
I6+qiPLMoZcAAAAASUVORK5CYII=
)
C.设8x2-12=y,则![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADMAAAAjCAYAAAA5dzKxAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAGGSURBVFhH7VdRssMgCPRk3snreBmP4lF4gGkl
viRPG9QxfXb60YxDWFh2qYEHHfMgLPANYCJ4a8CFtfp22JnoLRjzBDDRg/PhCZ1BejkPET/L0yw4
Cz7SnKwOJjgx8IuDCc7w0Jdfm1q1xDnxmcU7sy/9P5iBVEzF5pGwpL7pTFtnjubz7FlZJZrv1yyz
wW+ryjQwn7cxgDMvC6Eo+bc6mLcqivYDyr6kw+dAKPcyVp7vJjBn8s30kFsprkR2Vz3MwWdu3wHD
tJKF2gyeaId5HPtL+bwtgd9U8IVf1b6X7slzCaYtydrbBCZv3RG7ovZvQotmtVB2ux1v4YpbBFPY
ieJ0FIAEOA2lxY64Hb/ry3F1c7g0J7GQFdQBIos1zDS11KulBE3SfBmYuMyUmrfXGTWTI5VhmZfu
3FLX+3dTZzqa3P0U6yNsNPvb5OpDzrspwHQyuYHYNjBiaLVNbhaYXiY3Cs9bmvua3Bg4GYzSij4m
7eO3mJkmpw0cfW6eyamD0Q44M94PvWZ417Arc0AAAAAASUVORK5CYII=
)
D.设
,则y-
-
(2002•包头)(1)解分式方程:
.
(2)已知在同一直角坐标系中,一次函数y=-x+4和反比例函数y=
(k≠0)的图象有两个不同的交点Pl(x1,y1)和P2(x2,y2),且x12+x22+8x1x2-x12x22=0,求k的值.
-
(2002•包头)(1)解分式方程:
.
(2)已知在同一直角坐标系中,一次函数y=-x+4和反比例函数y=
(k≠0)的图象有两个不同的交点Pl(x1,y1)和P2(x2,y2),且x12+x22+8x1x2-x12x22=0,求k的值.