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[备考经验] 【SAT官方每日一题】7/25/12 Mathematics > Standard Multiple Choice [复制链接]

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发表于 2012-7-27 22:55:17 |只看该作者 |倒序浏览
Read the following SAT test question and then click on a button to select your answer.
2 \6 h& [% `6 t7 f. y8 L* S- @0 u) ~+ P3 g9 ]3 z
In triangle , the length of side is and the length of side is . Which of the following could be the length of side ?% w* J; H# G# _) [+ j( G4 N
. w* _6 J) z- Z2 o
; b0 Z3 j+ L% ^3 j+ n" q

/ v, J. d* X" v* y) d
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A. ) V6 c5 H! q' c# [( x+ y( E8 e

% `* n: V0 C: D$ \& wB. $ n- @! y# t4 g6 Y! B

1 I0 L) c, G9 S4 V5 ~$ mC. $ a2 n( A3 b2 X
8 w' S5 Q3 X$ ~4 `
D. / M/ z8 d6 e! b! A5 }3 m
6 B, \1 X% j7 G: t$ F8 U
E.  2 v8 H3 e, Z+ ~. h- S+ S% m
. C* T/ g2 ~: L" G+ X$ o" p2 S
正确答案:D
9 l0 _+ n; i% ?* Z2 ^
/ O! L- `# \, |解析:
5 L) j; }6 w. G2 }1 o, M" B" b/ c( T
By the Triangle Inequality, the sum of the lengths of any two sides of a triangle must be greater than the length of the remaining side. Therefore,, or . Thus, , which eliminates options (A), (B), and (C). Also by the Triangle Inequality, , or , which eliminates choice (E). Therefore, of the given choices, only choice (D), , could be the length of side.
; F( P9 i/ }, S! W5 M% Q9 }+ |1 [' R4 ?2 A7 A( a' Y8 @3 g9 }! d& B

  ~5 @% P, L  E5 b2 K1 V3 F0 ]' R( B2 n; M  t1 ~
0 0

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RE: 【SAT官方每日一题】7/25/12 Mathematics > Standard Multiple Choice [修改]

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【SAT官方每日一题】7/25/12 Mathematics > Standard Multiple Choice
https://bbs.gter.net/thread-1405025-1-1.html
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