题目
答案 | |
| ∵x≤1时,函数y=-x2+2x+1=-(x-1)2+2,在(-∞,1]上单调递增;x>1时,函数y=x3+1在(1,+∞)上单调递增 又x≤1时,-x2+2x+1≤2,x>1时,x3+1>2 ∴函数f(x)=
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答案 | |
| ∵x≤1时,函数y=-x2+2x+1=-(x-1)2+2,在(-∞,1]上单调递增;x>1时,函数y=x3+1在(1,+∞)上单调递增 又x≤1时,-x2+2x+1≤2,x>1时,x3+1>2 ∴函数f(x)=
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