Is there an inverse root power function in Delphi?

For example, 5 to the power 4 is 625, and there is a power function in 
Delphi to do this.

But how can I work out the 4th root of 625 (giving an answer of 5), is there 
a function of this?

This is linked to my previous post wanting to know how to convert from 
Extended to Int64/Integer, the Power function in Delphi returns a variable 
in Extended format. Thanks to those who replied to that one.

Thanks,
Stephen 

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