方程=的实根有    (      )       (A) 1个  (B) 2个  (C) 3个  (D)

方程=的实根有    (      )

      (A) 1个  (B) 2个  (C) 3个  (D) 无穷多个

答案

C


解析:

作y=与y=的图象,从图中可以看出:两曲线有3个交点,即方程有3个实根.选(C)


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