Math for Quantitative Finance
# Variance

Which of the following is always equal to \(\text{cov}(X,X)\)?

Let \(X\) be the result of rolling a fair six-sided dice. What is \(\text{cov}(X^2, X)\)?

Let \(X\) be the result of rolling a fair six-sided die. What is \(\text{var}(X^2+X)\)?

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