SAT数学是中国考生比较不擅长的一门考试，要考好SAT数学，最基本是要坚持每天练习，下面毕达教育的老师给大叫一道SAT数学练习的题目。

SAT数学

选择：

Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer.

If

, then

 

Answer Choices

(A)

 

(B)

 

(C)

 

(D)

 

(E)

 

The correct answer is C

Explanation

You are given that

. Dividing both sides of the equation by gives . Thus, the answer is .

 

下面是一道和SAT官方每日一题相似的题目，供大家练习：

 

 

In the

plane above, line contains the points and . If line (not shown) contains the point and is perpendicular to , what is an equation of ?

 

Answer Choices

(A)

 

(B)

 

(C)

 

(D)

 

(E)

 

The correct answer is A

Explanation

Difficulty: Medium

Since the coordinates of two points on line

are given, the slope of is . Line , which is perpendicular to will have a slope of since slopes of perpendicular lines are negative reciprocals of each other. The equation of can be written as . Since line also contains point , it follows that .

 

Therefore, an equation of line

is .

 

大家可以在备考SAT的过程中关注SAT每日一题的内容，这样就可以更好有不间断的练习，也就能在日积月累的过程中得到提高。