root with 'n' non-integer: D=S^n?

[JBlackhole]

To all,

A really stupid question but one I need to ask

I have the equation D=S^b where is a non-integer (ie a real). Mathcad does not have a function to return S if D and b are known?

Thanks

Regards

JXB

[LucMeekes · Accepted solution]

[JBlackhole]

Thanks. I do know why  put in my head that there was a pre-defined function!! Must have confused with something else. (Otherwise I can write S=D^(1/b)