Algebra
Power Mean Inequalities
Suppose the average of \( 5 \) positive numbers is equal to \( 2. \) What is the maximum possible product of the numbers?
Suppose \( xyz = 8 \) with \(x, y, z > 0. \) What is the minimum value of \( x + y + z \)?
What is the largest \( n \) for which
\[ x^3 + y^3 + z^3 \geq nxyz \]
holds for all \( x, y, z > 0 \)?
What is the largest \( n \) for which
\[ (x + y)(y + z)(x + z) \geq nxyz \]
holds for all positive \( x, y, z \)?
Suppose \( 2x + 3y + z = 18. \) Find the maximum value of \( xyz \) for \( x, y, z > 0. \)