山东省德州市2019年中考数学一轮复习第三章函数及其图像第9讲平面直角坐标系与函数(过预测)练习.doc

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1、1平面直角坐标系与函数考向 点的坐标特征1.2018贵港若点 A(1m,1n)与点 B(3,2)关于 y 轴对称,则 mn 的值是 ( D )A.5 B3 C3 D12.2018东营在平面直角坐标系中,若点 P(m2,m1) 在第二象限,则 m 的取值范围是 ( C )A.m1 Bm2 C.1m2 Dm1考向 点的坐标变化规律3.2018城阳区一模如图,在平面直角坐标系中,有若干个整数点,其顺序按图中“”方向排列:(1,0),(2,0),(2,1),(3,2),(3,1),(3,0),(4,0),根2据这个规律,则第 150 个点的坐标为(17,3).考向 函数自变量的取值范围4. 2018内

2、江已知函数 y ,则自变量 x 的取值范围是 ( B )x 1x 1A.1x1 Bx1 且 x1C.x1 Dx1考向 函数图象5. 2018随州“龟兔赛跑”这则寓言故事讲述的是比赛中兔子开始领先,但它因为骄傲在途中睡觉,而乌龟一直坚持爬行最终赢得比赛,下列函数图象可以体现这一故事过程的是 ( B )6.2018仙桃甲、乙两车从 A 地出发,匀速驶向 B 地甲车以 80km/h 的速度行驶 1h 后,乙车才沿相同路线行驶乙车先到达 B 地并停留 1h 后,再以原速按原路返回,直至与甲车相遇在此过程中,两车之间的距离 y(km)与乙车行驶时间 x(h)之间的函数关系如图所3示下列说法:乙车的速度是 120km/h;m160;点 H 的坐标是(7,80);n7.5.其中说法正确的有 ( B )A.4 个 B3 个 C2 个 D1 个

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