SAT官方每日一题附答案和解析[数学](2018年6月13日)
日期:2018-06-13 09:50
(单词翻译:单击)
每日一题
Mathematics
(x+10000)(x+10000)=0
How many unique real solutions does the equation above have?
A.0
B.1
C.2
D.4
答案和解析
答案：B
解析：
Choice B is correct. The left-hand side of the equation can only be zero when one of the factors is zero.
If the first factor is zero, then x=-10000.
If the second factor is zero, then x=-10000.
These are both the same solution. So there is only 1 unique solution. This solution is also real.
The equation has 1 unique real solution.
重点单词
