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已知a>b>c,a+b+c=0,方程ax2+bx+c=0的两个实数根为x1,x2,(1)求...
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已知a>b>c,a+b+c=0,方程ax
2+bx+c=0的两个实数根为x
1,x
2,
(1)求
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAjCAYAAACgj+sEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADcSURBVDhPzVTbFYUgDOtk3Yl1WIZRGCUSERB5
CH7JuXx4T9ukbYJg88hmPHKCMwKRcI2b1qgQvFW8xBcEwMOqwbw+bgneQt/KB7KZUqTjYNgHr9qA
2Z4rgXQYmCjF7x5gTOjQ4dSGCe10iKCwHU4BoTMdZ4b7kIYOg3Mvg6bzlnc3vaKr7+Jbqc6YfYRT
Bov3G8Iq9xS338PPEYqmgpEGiq0cp9kA0apDA7FyCT4tODEQ7fk0fO+/a5xCe7bVn4hl+FLTSc8M
/ewRfs2JFs3i4zNzTxq+S+v7/qGWDktr8cBIE1/mAAAAAElFTkSuQmCC
)
的取值范围;
(2)若
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAG0AAAAgCAYAAAAYPvbkAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
,求
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFYAAAAgCAYAAACILY8rAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAIDSURBVGhD7ZoBjoQgDEU5GXfiOlyGo3iULqAg
OgKWFqIrm0x2ZiK/8Kyl/IyA+deFgOiiOkVhgu2UBHiwRoEQYn0p02laL5LN8MCBXTTIANO9t3Cl
Xl5EgXmqBR4osIsxkGJctAQh9eE75qk/Wq7EAwX2Z5XuMfgw2BIPEliXsZ8uBSeyKQ8CWANqZmuC
9sijGaxRCmZPsHM982gC61J+dlo71CseeLB2wzrUVfv505AzPFBgfXsVDgfx/0tLAkNClHigwD66
qcROjgFsKaSAcCSLO7zd3Vw29tjxqbGo41MSV2AZ9beMXUBLCXpxUNsebaM2/+CnVJw9BWqs9vHF
OcZ1t+un9y2WgrVetEHFPoXUWNTxfr6FUsChv9dYZyj0ePyvqFNjUcdXwAKDfgRr3PFUuHKAzT/8
9dRY1PG1jOXQ92BDg+tqkO9JazumtwzbbsKtWAX96vi7fnFmjVX9cx7l/FjXl8aGP1xU6vijEA5s
2DiqsTL6t8YT/WI0Cy4/NjkZ2+4BBxZXMFx3gtcf7Rd38GPbFn4fLpP+aL84idd48mJaeJY0j/5o
v5jBj+VZeD6DOfRH+8UsfizHwkuFga4/2i9m8WNtP9a0uYyqsaP9Yh4/du2unwt2tF/M4cd6ptvv
CYIvy25yE/RH+8XTj71fg9iubGy32OL/W6EJttOt/QO6KM/a7d4FxgAAAABJRU5ErkJggg==
)
的值.
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