问题
选择题
若函数f（x）=logm（m-x）在区间[3，5]上的最大值比最小值大1，则实数m=（ ）
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答案
因为函数f（x）=logm（m-x）在区间[3，5]上是单调函数，m＞5，所以logm（m-3）-logm（m-5）=1．
所以
=m，即m2-6m+3=0，又m＞5，解得m=3+m-3 m-5
．6
故选B．
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若函数f（x）=logm（m-x）在区间[3，5]上的最大值比最小值大1，则实数m=（ ）
|
因为函数f（x）=logm（m-x）在区间[3，5]上是单调函数，m＞5，所以logm（m-3）-logm（m-5）=1．
所以
=m，即m2-6m+3=0，又m＞5，解得m=3+m-3 m-5
．6
故选B．
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Mike: Hello! It's Mike. Can I speak to John, please? Jim: Sure. 1. on please. He's 2. the room. John, here is a 3. for you. John: I'm coming. Who's 4. ? Jim: Mike. John: Thank you. John: Hello, Mike. 5. are you doing? Mike: I'm talking to you. How's your family? John: Just fine. My mom is 6. the clothes. My dad is 7. the newspaper. My brother is 8. his homework. My sister is 9. pictures. Mike: Let's 10. football together! John: Great! See you later. Mike: Bye! |