函数y=1-1/(x-1) ( )A.在(-1,+∞)内单调递增 B.在(-1,+∞)内单调递减C.在(1,+∞)内单调递增 D在(1,+∞)内单调递减
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![函数y=1-1/(x-1) ( )A.在(-1,+∞)内单调递增 B.在(-1,+∞)内单调递减C.在(1,+∞)内单调递增 D在(1,+∞)内单调递减](/uploads/image/z/8190966-30-6.jpg?t=%E5%87%BD%E6%95%B0y%3D1-1%2F%28x-1%29+%28+%29A.%E5%9C%A8%28-1%2C%2B%E2%88%9E%29%E5%86%85%E5%8D%95%E8%B0%83%E9%80%92%E5%A2%9E+B.%E5%9C%A8%28-1%2C%2B%E2%88%9E%29%E5%86%85%E5%8D%95%E8%B0%83%E9%80%92%E5%87%8FC.%E5%9C%A8%281%2C%2B%E2%88%9E%29%E5%86%85%E5%8D%95%E8%B0%83%E9%80%92%E5%A2%9E+D%E5%9C%A8%281%2C%2B%E2%88%9E%29%E5%86%85%E5%8D%95%E8%B0%83%E9%80%92%E5%87%8F)
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函数y=1-1/(x-1) ( )A.在(-1,+∞)内单调递增 B.在(-1,+∞)内单调递减C.在(1,+∞)内单调递增 D在(1,+∞)内单调递减
函数y=1-1/(x-1) ( )
A.在(-1,+∞)内单调递增 B.在(-1,+∞)内单调递减
C.在(1,+∞)内单调递增 D在(1,+∞)内单调递减
函数y=1-1/(x-1) ( )A.在(-1,+∞)内单调递增 B.在(-1,+∞)内单调递减C.在(1,+∞)内单调递增 D在(1,+∞)内单调递减
y=1/x这个是在(0,正无穷)递减,前面加个负号就是递增,y=1-1/(x-1)只要把x-1=0解出,在(1,+∞)内单调递增 选C.
以后这种题目都这样做.