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Math Help - Is this just a made up function/combination?

  1. #1
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    Is this just a made up function/combination?

    It's on a practice SAT test.

    If x (then there's a symbol that's a filled in diamond) y = x^(1/y), then (-3 (filled in diamond) 1/3) (filled in diamond) 1/3 = ?

    I understand how to solve it, but is the filled in diamond an operation that's made up for the problem, or is it a known operation?
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  2. #2
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    Hi

    It is an operation that's made up for the problem
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  3. #3
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    That's what I thought.
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  4. #4
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    And the first part, "x (filled in diamond) y = x^(1/y)" tells you how that symbol is defined. What is -3 (filled in diamond) 1/3 ?
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  5. #5
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    The second part is the problem. After they define the operation, then they want you to perform it on the second part.
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