证明：方程[tex=4.214x1.143]4wxT3jjYgaj75+4vYUQLVg==[/tex]在[tex=2.714x1.571]tV42+SxMkbWDR1vbgwpi69tM2kvhtKpBZJTiX30/ikU=[/tex]内必有实根.
证明：方程[tex=4.214x1.143]4wxT3jjYgaj75+4vYUQLVg==[/tex]在[tex=2.714x1.571]tV42+SxMkbWDR1vbgwpi69tM2kvhtKpBZJTiX30/ikU=[/tex]内必有实根.
1