SAT课程
17600269130
7*24小时专业老师服务
SAT课程
17600269130
7*24小时专业老师服务
新SAT官方Daily Practice每日一题计算题(9.7)
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Read the following SAT test question and then click on a button to select your
answer.
9月SAT数学官方每日一练,点击进入
(x+10000)(x+10000)=0
How many unique real solutions does the equationabove have?
A.0
B.1
C.2
D.4
重点单词:
solution [sə'lu:ʃən]n. 解答，解决办法，溶解，溶液
multiple ['mʌltipl]adj. 许多，多种多样的n. 倍数，并联
unique [ju:'ni:k]adj. 独一无二的，独特的，稀罕的
equation [i'kweiʃən]n. 相等，方程(式), 等式，均衡
factor ['fæktə]n. 因素，因子
答案：B
解析：
Choice B is correct. The left-hand side of theequation can only be zero when
one of the factors iszero.
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 alsoreal.
The equation has 1 unique real solution.
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