Shhhh! Don't give me the hint

Algebra Level 3

For positive real numbers a,b,c,d,a,b,c,d, find the minimum value of the following expression:

(a+b+c+d)(25a+36b+81c+144d).\displaystyle (a+b+c+d)\Bigl( \dfrac{25}{a} + \dfrac{36}{b} +\dfrac{81}{c} +\dfrac{144}{d} \Bigr).

×

Problem Loading...

Note Loading...

Set Loading...