I have question to answer regarding $X_n$ where $X_n$ is a Markov chain, $n$=$0$,$1$,$2$,...
I am loking for 
What I don't understand is what this $3$ on $X_{n+1}$ is! Any ideas?
I have question to answer regarding $X_n$ where $X_n$ is a Markov chain, $n$=$0$,$1$,$2$,...
I am loking for 
What I don't understand is what this $3$ on $X_{n+1}$ is! Any ideas?
$$E((X_{n+1})^3\mid X_n)\text{}$$