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- 医师定期考核
答案:
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1.Tx≤1()y=12x=12-x,x>1,
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2.x,x≤1,③3)yT=12-x,x>1,
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3.(1)(x yx x>0,y>0,x≠y,a>1;
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4.1)(x y)x (x-y)y
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5.计算 [(x, y) | x <- [1, 2], y <- [1, 2]] 的结果是
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6.语句 x = y = z = 1 等价于 z = 1; y = z; x = y
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7.以下语句后的x是什么?x = 1 y = 2 x *= y + 1
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8.已知实数x,y满足xy 1=2x y,且x>1,则(x 1)(y 2)的最小值为______.
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9.已知实数x,y满足xy 1=4x y,且x>1,则(x 1)(y 2)的最小值为______.
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10.(11) y=xe ;(12) y=ln(x 1 x2 ).解 (1)y′=4x 1, y′′=4− 1 .