对实数a和b，定义运算“⊗”：a⊗b＝a,a-b≤1b,a-b>1，设函数f(x)＝(x2－2)⊗(x－x2)，x∈R，若函数y＝f(x)－c的图象与x轴恰有两个公共点，则实数c的取值范围是_刷题宝

题干

对实数a和b，定义运算“⊗”：a⊗b＝a,a-b≤1b,a-b>1，设函数f(x)＝(x²－2)⊗(x－x²)，x∈R，若函数y＝f(x)－c的图象与x轴恰有两个公共点，则实数c的取值范围是（）

A：(－∞，－2∪ $(- 1, \frac{3}{2})$

B： $(- 1, - \frac{3}{4}) \cup \frac{1}{4}, + \infty)$

C： $(- 1, \frac{1}{4}) \cup (\frac{1}{4}, + \infty)$

D：(－∞，－2∪ $(- 1, - \frac{3}{4})$

上一题下一题 0.0难度选择题更新时间:2020-03-08 12:37:17

答案(点此获取答案解析）

D

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