What does the circle symbol mean? and isn't this a part of number operations like a*b=b*a
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number operations
Source: Beat The GMAT — Problem Solving |
The circle symbol defines a function.
=>isn't this a part of number operations like a*b=b*a
in your example * defines multiplication. Multiplication is a function. How do you multiply? That is the rule that is pre-defined and that does not need explanation.
In the same way, the circle symbol defines a new function, and the value for this function has to be achieved using the given formula.
For more information see here:
https://en.wikipedia.org/wiki/Real-valued
=>isn't this a part of number operations like a*b=b*a
in your example * defines multiplication. Multiplication is a function. How do you multiply? That is the rule that is pre-defined and that does not need explanation.
In the same way, the circle symbol defines a new function, and the value for this function has to be achieved using the given formula.
For more information see here:
https://en.wikipedia.org/wiki/Real-valued
