AM–GM inequality (n positive numbers) (Arithmetic mean is at least geometric mean; equality iff all xᵢ equal)

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Arithmetic mean is at least geometric mean; equality iff all xᵢ equal

What each symbol means

SymbolWhat it stands for
x_iPositive real numbers

When to use this

All xᵢ > 0; equality iff x₁ = … = xₙ.