韦达定理解已知关于x的方程K^2×X^2-2(K+1)X+1=0有两个实数根(1)求K的取值范围(2)当K=1时,设所给

1个回答

  • 1）X ^ 2-9X +8 = 0答案：X1 = 8×2 = 1

    （2）X ^ 2 +6的x 27 = 0答案：X1 = 3×2 = -9

    （ 3）X ^ 2-2X-80 = 0答案：X1 = -8×2 = 10

    （4）X ^ 2 +10 X-200 = 0答案：X1 = -20×2 = 10

    （5）X ^ 2-20X +96 = 0答案：X1 = 12×2 = 8

    （6）X ^ 2 +23 x +76 = 0答案：X1 = -19×2 = -4

    >（7）X ^ 2-25X +154 = 0答案：X1 = 14×2 = 11

    （8）X ^ 2-12X-108 = 0答案：X1 = -6×2 = 18

    （9）X ^ 2 +4的x 252 = 0答案：X1 = 14,X2 = -18

    （10）X ^ 2-11X-102 = 0答案：X1 = 17×2 = -6

    >（11）X ^ 2 +15的x 54 = 0答案：X1 = -18×2 = 3

    （12）X ^ 2 +11 x +18 = 0答案：X1 = -2×2 = -9

    （13）X ^ 2-9X +20 = 0答案：X1 = 4×2 = 5

    （14）X ^ 2 +19 x +90 = 0答案：X1 = -10×2 = - 9

    （15）X ^ 2-25X +156 = 0答案：X1 = 13×2 = 12

    （16）X ^ 2-22X +57 = 0答案：X1 = 3×2 = 19 BR />（17）X ^ 2-5X-176 = 0答案：X1 = 16×2 = -11

    （18）X ^ 2-26X +133 = 0答案：X1 = 7×2 = 19 （19）X ^ 2 +10 X-11 = 0答案：X1 = -11×2 = 1

    （20）X ^ 2-3X-304 = 0答案：X1 = -16×2 = 19 BR />（21）X ^ 2 +13的x 140 = 0答案：X1 = 7×2 = -20

    （22）X ^ 2 +13的x 48 = 0答案：X1 = 3×2 = - 16

    （23）X ^ 2 +5的x 176 = 0答案：X1 = -16×2 = 11

    （24）X ^ 2 +28 x +171 = 0答案：X1 = -9 X2 = -19

    （25）X ^ 2 +14 x +45 = 0答案：X1 = -9×2 = -5

    （26）X ^ 2-9X-136 = 0答案：X1 = -8×2 = 17

    （27）X ^ 2-15X-76 = 0答案：X1 = 19,X2 = -4

    （28）X ^ 2 +23 x +126 = 0答案： X1 = -9×2 = -14

    （29）X ^ 2 +9 X-70 = 0答案：X1 = -14×2 = 5

    （30）X ^ 2-1X-56 = 0答案：X1 = 8×2 = -7

    （31）X ^ 2 +7的x 60 = 0答案：X1 = 5×2 = -12

    （32）X ^ 2 +10的x 39 = 0答案：X1 = -13×2 = 3

    （33）X ^ 2 +19 x +34 = 0答案：X1 = -17×2 = -2

    （34）X ^ 2-6X -160 = 0答案：X1 = 16×2 = -10

    （35）X ^ 2-6X-55 = 0答案：X1 = 11,X2 = -5

    （36）X ^ 2-7X -144 = 0答案：X1 = -9×2 = 16

    （37）X ^ 2 +20 x +51 = 0答案：X1 = -3×2 = -17

    （38）X ^ 2 -9X +14 = 0答案：X1 = 2×2 = 7

    （39）X ^ 2-29X +208 = 0答案：X1 = 16×2 = 13

    （40）X ^ 2 +19 X-20 = 0答案：X1 = -20×2 = 1

    （41）X ^ 2-13X-48 = 0答案：X1 = 16×2 = -3

    （42）X ^ 2 + 10×24 = 0答案：X1 = -6×2 = -4

    （43）X ^ 2 +28 x +180 = 0答案：X1 = -10×2 = -18

    （44） X ^ 2-8X-209 = 0答案：X1 = -11×2 = 19

    （45）X ^ 2 +23 x +90 = 0答案：X1 = -18×2 = -5

    （ 46）X ^ 2 +7 x +6 = 0答案：X1 = -6×2 = -1

    （47）X ^ 2 +16 x +28 = 0答案：X1 = -14×2 = -2 BR />（48）X ^ 2 +5 X-50 = 0答案：X1 = -10×2 = 5 （49）X ^ 2 +13 X-14 = 0答案：X1 = 1,X2 = - 14

    （50）X ^ 2-23X +102 = 0答案：X1 = 17×2 = 6

    （51）X ^ 2 +5的x 176 = 0答案：X1 = -16×2 = 11

    （52）X ^ 2-8X-20 = 0答案：X1 = -2×2 = 10

    （53）X ^ 2-16X +39 = 0答案：X1 = 3×2 = 13

    （54）X ^ 2 +32 x +240 = 0答案：X1 = -20×2 = -12

    （55）X ^ 2 +34 x +288 = 0答案：X1 = -18 X2 = -16

    （56）X ^ 2 +22 x +105 = 0答案：X1 = -7×2 = -15

    （57）X ^ 2 +19 X-20 = 0答案： X1 = -20×2 = 1

    （58）X ^ 2-7X +6 = 0答案：X1 = 6×2 = 1 （59）X ^ 2 +4的x 221 = 0答案： X1 = 13,X2 = -17

    （60）X ^ 2 +6的x 91 = 0答案：X1 = -13×2 = 7 （61）X ^ 2 +8×12 = 0答案：X1 = -2×2 = -6

    （62）X ^ 2 +7的x 120 = 0答案：X1 = -15×2 = 8

    （63）X ^ 2-18X +17 = 0答案：X1 = 17,X2 = 1

    （64）X ^ 2 +7的x 170 = 0答案：X1 = -17×2 = 10 （65）X ^ 2 +6 X + 8 = 0答案：X1 = -4×2 = -2

    （66）X ^ 2 +13 x +12 = 0答案：X1 = -1×2 = - 12

    （67）X ^ 2 +24 x +119 = 0答案：X1 = -7×2 = -17

    （68）X ^ 2 +11的x 42 = 0答案：X1 = 3×2 = -14

    （69） X ^ 20X-289 = 0答案：X1 = 17,X2 = -17

    （70）X ^ 2 +13 x +30 = 0答案：X1 = -3×2 = - 10

    （71） X ^ 2-24X +140 = 0答案：X1 = 14×2 = 10

    （72）X ^ 2 +4的x 60 = 0答案：X1 = -10×2 = 6

    （73） χ^ 2 +27 x +170 = 0答案：X1 = -10×2 = -17

    （74）X ^ 2 +27 x +152 = 0答案：X1 = -19×2 = -8

    >（75）X ^ 2-2X-99 = 0答案：X1 = 11×2 = -9

    （76）X ^ 2 +12 x +11 = 0答案：X1 = -11×2 = -1 BR />（77）X ^ 2 +17 x +70 = 0答案：X1 = -10×2 = -7

    （78）X ^ 2 +20 x +19都= 0答案：X1 = - 19×2 = -1

    （79）X ^ 2-2X-168 = 0答案：X1 = -12×2 = 14

    （80）X ^ 2-13X +30 = 0答案：X1 = 3×2 = 10

    （81）X ^ 2-10X-119 = 0答案：X1 = 17,X2 = -7

    （82）X ^ 2 +16 X-17 = 0答案：X1 = 1 X2 = -17

    （83）X ^ 2-1X-20 = 0答案：X1 = 5×2 = -4

    （84）X ^ 2-2X-288 = 0答案：X1 = 18×2 = -16

    （85）X ^ 2-20X +64 = 0答案：X1 = 16×2 = 4

    （86）X ^ 2 +22 x +105 = 0答案：X1 = -7 X2 = -15

    （87）X ^ 2 +13 x +12 = 0答案：X1 = -1×2 = -12

    （88）X ^ 2-4X-285 = 0答案：X1 = 19×2 = -15

    （89）X ^ 2 +26 x 133 = 0答案：X1 = -19×2 = -7

    （90）X ^ 2-17X +16 = 0回答：X1 = 1,X2 = 16

    （91）X ^ 2 +3 X-4 = 0答案：X1 = 1,X2 = -4

    （92）X ^ 2-14X +48 = 0回答：X1 = 6×2 = 8

    （93）X ^ 2-12X-133 = 0答案：X1 = 19,X2 = -7

    （94）X ^ 2 +5 x +4开始= 0回答：X1 = - 1×2 = -4

    （95）X ^ 2 +6的x 91 = 0答案：X1 = 7×2 = -13

    （96）X ^ 2 +3 X-4 = 0答案：X1 = -4×2 = 1

    （97）X ^ 2-13X +12 = 0答案：X1 = 12,X2 = 1

    （98）X ^ 2 +7的x 44 = 0答案：X1 = - 11×2 = 4

    （99）X ^ 2-6X-7 = 0答案：X1 = -1×2 = 7

    （100）X ^ 2-9X-90 = 0答案：X1 = 15×2 = -6

    （101）X ^ 2 +17 x +72 = 0答案：X1 = -8×2 = -9

    （102）X ^ 2 +13 X-14 = 0答案：X1 = -14×2 = 1

    （103）X ^ 2 +9的x 36 = 0答案：X1 = -12×2 = 3

    （104）X ^ 2 -9X-90 = 0答案：X1 = -6×2 = 15

    （105）X ^ 2 +14 x +13 = 0答案：X1 = -1×2 = -13

    （106）× ^ 2-16X +63 = 0答案：X1 = 7×2 = 9

    （107）X ^ 2-15X +44 = 0答案：X1 = 4×2 = 11

    （108）X ^ 2 2的x 168 = 0答案：X1 = - 14×2 = 12

    （109）X ^ 2-6X-216 = 0答案：X1 = -12×2 = 18

    （110）×^ 2-6X-55 = 0答案：X1 = 11,X2 = -5

    （111）X ^ 2 +18 x +32 = 0答案：X1 = -2×2 = -16所有权加我Q842078004过程

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