编程:有一函数如下: y={xif x<12x−1if 1<=x<103x−11if x>=10y = \begin{cases} x & \text{if } x < 1 \\ 2x - 1 & \text{if } 1 <= x < 10 \\ 3x - 11 & \text{if } x >= 10 \end{cases}y=⎩⎨⎧x2x−13x−11if x<1if 1<=x<10if x>=10 输入x值,输出y值。
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