Prove the identity. 
Definitions:
Annual Return
The percentage change in an investment's value over a one-year period, including dividends, interests, and capital gains.
Investment
The allocation of resources, usually financial, in something to earn a return or gain profit.
Equal Alternatives
A situation or choice where the options available have the same value or likelihood.
Frequency
A statistic specifying the number or proportion of items in a class that have a given property.
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