請問OG#434.#436

[christinehsu]

不好意思請問OG第434題
A certain musical scale has 13 notes,each having a different frequency,
measured in cycles per second.In the scale,the notes are ordered by increasing frequency,and the highest frequency is twice the lowest.For each of the 12 lowest ferquencies, the ratio of a frequency to the next highest frequency is a fixed constant . If the lowest frequency is 440 cycles per second, then the 7th note in the scale is how many cycles per second?
A)400根號2
B)440根號2七次方
C)440根號2十二次方
D)400*2的七次方開12次方根
E)440*2的12次方開7次方根

答案是A
不好意思.我實在是不知道怎麼PO上根號的符號.所以才用中文去描述選項
這題我實在不太了解他的意思.要麻煩各位幫我解答.非常的謝謝

#436
Equal amounts of water were poured into two empty jars og different capacities, which made one jar 1/4 full and the other jar 1/3 full. If the water in the jar with the lesser capacity is then poured into the jar will be filled with water?
A)1/7
B)2/7
C)1/2
D)7/12
E)2/3

答案是C
這題我怎麼算都是3/4我不太清楚怎麼算法
也是要麻煩大家幫我解答
非常的感謝.

真的很謝謝版主可以開這個版
讓我門台灣人有一個屬於自己可以得到GMAT的資訊和討論的網站
真的很開心
謝謝

[huacy]

1.
最低的是440 最高的是最低的2倍 中間有12個間隔
所以每個間隔是 2^(1/12)
第七個的頻率 440*(2^(1/12))^6=440*2^(6/12)=440*2^(1/2)
所以就是440乘上根號2囉

2.
同量的水 倒入兩個容器分別達到該容器的1/3和1/4
那1/3的容器比較小 1/4的比較大
如果將小的倒到大的容器內 就是 1/4+1/4=1/2

英文不好 不知有沒有看錯題意

[魚]

(FF)完全沒錯

[christinehsu]

真的很謝謝你的回答
謝謝!!^^