题干

若一元二次方程ax2﹣c=0(ac>0)的两个根分别是n+1与2n﹣4,则
c
a
=(   )

A:﹣2

B:1

C:2

D:4

上一题 下一题 0.0难度 选择题 更新时间:2015-12-01 06:55:31

答案(点此获取答案解析)

D

同类题1

阅读下面的诗,回答相关问题。

                                                                                                    夏日南亭怀辛大
                                                                                                            孟浩然
                                                                                           山光忽西落,池月渐东上。
                                                                                           散发乘夕凉,开轩卧闲敞。
                                                                                           荷风送香气,竹露滴清响。
                                                                                           欲取鸣琴弹,恨无知音赏。
                                                                                           感此怀故人,中宵劳梦想。