2022年高职单招《数学》每日一练试题08月08日

<p class="introTit">单选题</p><p>1、已知二次函数<img src="https://img2.meite.com/questions/202202/2662199135a230f.png" />的值恒小于零，那么实数m的取值范围为（）</p><ul><li>A：<img src='https://img2.meite.com/questions/202202/266219913faeaaa.png' /></li><li>B：<img src='https://img2.meite.com/questions/202202/2662199146d3a3d.png' /></li><li>C：<img src='https://img2.meite.com/questions/202202/266219914d74b9d.png' /></li><li>D：<img src='https://img2.meite.com/questions/202202/266219915394b14.png' /></li></ul><p>答 案：B</p><p>2、函数<img src="https://img2.meite.com/questions/202202/256218881872cc0.png" />（）</p><ul><li>A：<img src='https://img2.meite.com/questions/202202/25621888226b2a1.png' /></li><li>B：<img src='https://img2.meite.com/questions/202202/256218882bd53ab.png' /></li><li>C：<img src='https://img2.meite.com/questions/202202/2562188834bc382.png' /></li><li>D：<img src='https://img2.meite.com/questions/202202/256218883d92b2d.png' /></li></ul><p>答 案：B</p><p>3、<img src="https://img2.meite.com/questions/202202/2462172c7cda901.png" />  </p><ul><li>A：n在定义域上是减函数n</li><li>B：<img src='https://img2.meite.com/questions/202202/2462172ce370da3.png' /></li><li>C：<img src='https://img2.meite.com/questions/202202/2462172cf207d57.png' /></li><li>D：n在R上是增函数n</li></ul><p>答 案：C</p><p class="introTit">主观题</p><p>1、<img src="https://img2.meite.com/questions/202208/0462eb828307e97.png" /></p><p>答 案：<img src="https://img2.meite.com/questions/202208/0462eb828f1f346.png" /></p><p class="introTit">填空题</p><p>1、<img src="https://img2.meite.com/questions/202202/266219d29dacace.png" />  </p><p>答 案：4</p><p>2、设<img src="https://img2.meite.com/questions/202202/2562184c23b4f8c.png" />，则M与N的大小关系为_____.  </p><p>答 案：N>M</p><p>3、若<img src="https://img2.meite.com/questions/202202/26621986498c177.png" />，则f(5)=_____。</p><p>答 案：31</p><p class="introTit">简答题</p><p>1、在△ABC中，<img src="https://img2.meite.com/questions/202202/2562189b59664a3.png" />的坐标是(2,3)，<img src="https://img2.meite.com/questions/202202/2562189b6b47584.png" />的坐标是(1,k)，且△ABC的一个内角为直角，求k的值.  </p><p>答 案：<img src="https://img2.meite.com/questions/202202/2562189c7cb604b.png" /></p>