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Efficient way to find the expected value of the exponent of two 6 sided die

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Given you roll two fair six sided die x and y with faces from 1 to 6, is there any trick to calculate the expected value of x^y?

I believe you could calculate the expected value of each of 1^y, 2^y ... 6^y as partial sums of six different geometric series, then divide by 6, but I wonder if there is any smarter way that involves less arithmetic to arrive at the final answer.


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