Forgot password? New user? Sign up

Existing user? Log in

How many ordered quadruples of non-negative real numbers are there that satisfies:

$\begin{aligned} a + b + c + d = 4 \\ a^2bc + b^2cd + c^2da + d^2 ab = 4 \\ \end{aligned}$

Now prove this.

Problem Loading...

Note Loading...

Set Loading...