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Daily GMAT MATH QUESTION



 1. If f(x) = \frac{125}{x^{3}}, what is the value of \frac{f(5x)}{f(x/5)} in terms of f(x)?

A. (f(x))^{2}

B. f(x^{2})

C. (f(x))^{3}

D. f(x^{3})

E. f(125x)

 Answer Explanation :

Say x=1, then:

f(x) = f(1)=\frac{125}{1^{3}}=125;

f(5x)=f(5)=\frac{125}{5^3}=1;

f(\frac{x}{5})=f(\frac{1}{5})=\frac{125}{(\frac{1}{5})^3}=125*125.

{f(5x)}*{f(\frac{x}{5})}={f(5)}*{f(\frac{1}{5})}=125^2 and since f(x) = f(1)=125, then {f(5x)}*{f(\frac{x}{5})}=125^2=(f(x))^2.

Answer: A.


Tags : Math Exercises | GMAT MATH | GMAT MATH EXERCISE | Daily GMAT Practice | Daily GMAT MATH tutorial


 Best Regards,
Fattah Razzaq Education
CP : 0831-9475-7881
YM : Fattahrazzaq@rocketmail.com

2 Responses to "Daily GMAT MATH QUESTION"

  1. berkunjung
    buku tamunya dimana?

    ReplyDelete
    Replies
    1. Berkunjung kembali
      Pada menu atas guestbook mas
      hehehe

      best regards,
      FRedu

      Delete