[計量] GWD10-20,21

看板GMAT作者NOWIZKI (== ==)時間16年前 (2007/12/30 12:40)推噓3(3推 0噓 3→)

留言6則, 4人參與討論串1/1

Q20. If x > 0, then 1/[v(2x)+vx]= A. 1/v(3x) B. 1/[2v(2x)] C. 1/(xv2) D. (v2-1)/vx E. (1+v2)/vx Ans. D 我的答案是A 可是搞不懂為啥是D 怎麼算出來的？ Q21. When Leo imported a certain item, he made a 7 percent import tax on the portion of the total value of the item in excess of $1000. If the amount of the import tax that Leo paid was $87.50, what was the total of the item? A. $1600 B. $1850 C. $2250 D. $2400 E. $2750 Ans. C 看不太懂題目的意思勒請教一下題意和作法為何？ THX. -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.230.9.101

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Hshs

12/30 13:19, , 1^F

12/30 13:19, 1^F

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Hshs

12/30 13:22, , 2^F

12/30 13:22, 2^F

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NightCat427

12/30 13:57, , 3^F

12/30 13:57, 3^F