5道SAT数学练习题及答案.

　　下面为大家整理的是5道SAT数学练习题的内容，后面附有详细的答案解析。SAT数学题拥有自己的逻辑关系和解题方法，这些都是大家在备考的时候，需要格外注意的部分。下面我们一起来看看这些数学题的详细内容吧。

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　　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 dined by , where , for which of the following values of is undined?

　　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 . Therore, .

　　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. Therore, statement must be true, but statement , , is not always true. For statement , you can write , and since , it follows that . Therore, both statements and must be true.

　　5.The correct answer is C

　　If , then . If , then . If , then , which is not dined because division by is undined. Therore, of the three values, , , and , the only one for which is undined 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。

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