题干
已知命题p：
x∈R,2x2＋1>0，则
x∈R,2x2＋1>0，则
A：p：x0∈R, 2x02＋1≤0
B：p：x∈R,2x2＋1≤0
C：p：x0∈R,2x02＋1<0
D：p：![](http://tiku. </p>
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<a href="/question/3424090.html">上一题</a> <a href="/question/3424092.html">下一题</a> 0.0难度 选择题 更新时间:2018-10-07 09:11:25
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A
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<p>在数轴上表示下列各数：+5，﹣3.5，0，2.5</p><p><img src="/Upload/site3/d/c/dc61fb8b43531e968c30e39dfb5f9aa1.png" data-cke-saved-src="/Upload/site3/d/c/dc61fb8b43531e968c30e39dfb5f9aa1.png" > </p>
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<p>在平面直角坐标中，已知点P（a，5）在第二象限，则点P关于直线m（直线m上各点的横坐标都是2）对称的点的坐标是（ ）</p>
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<h2 class="title">同类题3</h2>
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椭圆 <math xmlns=)
（Ⅰ） 求椭圆的方程；
（Ⅱ） 过点M（0，﹣1）作直线l交椭圆于A，B两点，交x轴于N点，满足 =﹣ ，求直线l的方程．
