45.8、已知函数f(x)=(x∧2-3x+2)lnx+2008x-2009,则方程f(x)=0在下面哪个范围内必有实根( B )A.(0,1) B.(1,2) C.(2,3) D.(2,4)
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![45.8、已知函数f(x)=(x∧2-3x+2)lnx+2008x-2009,则方程f(x)=0在下面哪个范围内必有实根( B )A.(0,1) B.(1,2) C.(2,3) D.(2,4)](/uploads/image/z/6902700-60-0.jpg?t=45.8%E3%80%81%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D%28x%E2%88%A72-3x%2B2%29lnx%2B2008x-2009%2C%E5%88%99%E6%96%B9%E7%A8%8Bf%28x%29%3D0%E5%9C%A8%E4%B8%8B%E9%9D%A2%E5%93%AA%E4%B8%AA%E8%8C%83%E5%9B%B4%E5%86%85%E5%BF%85%E6%9C%89%E5%AE%9E%E6%A0%B9%EF%BC%88+B+%EF%BC%89A.%280%2C1%29+B.%281%2C2%29+C.%282%2C3%29+D.%282%2C4%29)
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