【SAT官方每日一题】2012年7月17日（Mathematics > Standard Multiple Choice ）

滚吧肥汤圆UID: 3272378

" W% ~8 o9 b! F# n* O0 ?9 ~3 y考试类型: Mathematics > Standard Multiple Choice
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Read the following SAT test question and then click on a button to select your answer.

If  and  , and if , which of the following is true?
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C.

D.
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- ^: ^4 }" i4 M" f. e# N! Y正确答案:D

( b0 m) P( p. o4 d& B. }解析:

( p: O1 m; r7 U: x0 e5 j7 YIf and , and if , then rewriting as  gives . It follows that , and so . This last equation is equivalent to .
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