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# 請幫我算算這兩題數學 GMAT的題目

Q18:

Last year the price per share of Stock X increased by k percent and the earnings per share of Stock X increased by m percent, where k is greater than m. By what percent did the ratio of price per share to earnings per share increase, in terms of k and m?

A.k/m %

B.(k-m) %

C.[100(k-m)]/(100+k) %

D.[100(k-m)]/(100+m) %

E.[100(k-m)]/(100+k+m) %

答案: D

這題我看不懂在問什麼 請幫我翻譯順便解釋

Q27:

If f is the function defined for all k by f(k) = k5/16, what is f(2k) in terms of f(k)?

A.1/8 f(k)

B.5/8 f(k)

C.2 f(k)

D.10 f(k)

E.32 f(k)

正確答案是E~ why?

如果有人認為答案不是E 也請解釋一下為什麼

謝謝

### 1 Answer

- QQmanLv 61 decade agoFavorite Answer
1.去年Stock X在price方面增加百分之k

在earning方面增加百分之m

假如k大於m

請以k和m的方法表示去年在price方面增加百分比相對於在earning方面增加的百分比

ratio of price per share to earnings per share就是share和earning的比率

所以答案是d

2.你的f(k)應該是=k^5/16 (k的五次方除以16)

f(2k)=(2k)^5/16 (2k的五次方除以16)

所以f(2k)=32*f(k)

答案是e

Source(s): me