下面为大家整理的是5道
1.The graph of is shown above. If , and if is on the graph of , which of the following must be true?
Answer Choices
(A)
(B)
(C)
(D)
(E)
2.If , what is the value of ?
Answer Choices
(A)
(B)
(C)
(D)
(E) It cannot be determined from the information given.
3.If , which of the following must be equivalent to ?
Answer Choices
(A)
(B)
(C)
(D)
(E)
4.If , which of the following statements must also be true?
Answer Choices
(A) None
(B) only
(C) only
(D) only
(E) and
5.If the function is defined by , where , for which of the following values of is undefined?
Answer Choices
(A) None
(B) only
(C) only
(D) and only
(E) , , and
Explanation
1.The correct answer is D
The second coordinate of a point on the graph corresponds to . From the graph, you can see that for , the smallest value of is and the greatest value is , so .
2.The correct answer is A
Since , it follows that , and so . Therefore, .
3.The correct answer is E
If , then , so .
4.The correct answer is E
The quantity can be expressed as . If , then and . Since , either or or both. Therefore, statement must be true, but statement , , is not always true. For statement , you can write , and since , it follows that . Therefore, both statements and must be true.
5.The correct answer is C
If , then . If , then . If , then , which is not defined because division by is undefined. Therefore, of the three values, , , and , the only one for which is undefined is . Thus the correct response is
only.
以上就是这5道SAT数学练习题及答案的详细内容，包括了一些常见的知识点。大家可以在备考的时候，对此加以适当的练习和应用，测试自己在数学方面知识点的掌握情况。