Yes. All functions are relations, but not all relations are functions. Functions have to have only one y-value per x-value.
Yes, although functions that do so are not one-to-one functions. A vertical parabola is an example of one such function.
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The exponential function, logarithms or trigonometric functions are functions whereas a complex variable is an element of the complex field. Each one of the functions can be defined for a complex variable.
Logarithmic functions are converted to become exponential functions because both are inverses of one another.
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The Electronic Military Personnel Office (eMILPO) is the Army's personnel database. G-1 users can directly and indirectly manager personnel information on all assigned units within the eMILPO system.
https://www.hrc.army.mil/site/Active/TAGD/HRCC/ASB/search.htm
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