The partition function of two Bose particles, each of which can occupy any of the two energy levels 0 and $$\varepsilon $$ is

The partition function of two Bose particles, each of which can occupy any of the two energy levels 0 and $$\varepsilon $$ is Correct Answer $$2 + {e^{\frac{{ - 2\varepsilon }}{{kT}}}} + {e^{\frac{{ - \varepsilon }}{{kT}}}}$$

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