【SAT官方每日一题】8/1/12 Mathematics > Standard Multiple Choice

滚吧肥汤圆UID: 3272378

Read the following SAT test question and then click on a button to select your answer.
3 J+ P- v. ?2 D0 I% m8 U  T
: f0 g0 J! x' J+ y  Z9 u- eIf , what is the value of, ?
( d; ?, v1 }" q' ]8 V7 Q# Q
! i+ x" C0 w0 ^1 k5 A/ `- a
, e" p+ v5 B! k. g" y! P% z
, M: a+ h7 x! S8 ?  @$ }
0 z, _7 w% o& b( T( F
A.  40

* B+ E# K$ @9 K% tB.  18
( y# p5 ~/ G) W
C.  9
3 S0 i2 ^0 V# F7 v
* D2 U" C1 A4 C/ }9 l! |) q/ TD.  4
+ i- X4 g% P# m* R  U$ I
E. It cannot be determined from the information given.
1 y: ?+ z8 Q; g6 n2 J6 T
正确答案:A

; Z' W0 H' A( t6 D解析:

Since, , it follows that , and so . Therefore, .