Y by Adventure10, Mango247
Given
are positive integers pairwise distinct and
is also a positive integer
.
Determine under which conditions can
form terms of a same arithmetic progression.



Determine under which conditions can
![$\sqrt[n]{p},\sqrt[n]{q},\sqrt[n]{r}$](http://latex.artofproblemsolving.com/3/1/3/3133b60c921168020d149a9d28ef69b756a704d9.png)
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