Prime oddity and 39gii

[lrdheat]

Thanks for the note that this is known on Prime.

Another 39gii deal...

When plotting ((x^2+4)^(1/2))/2 + ((x^2-6*x+10)^1/2))/4, the extremum reduces no minimum or maximum found. When choosing root, it then reports extremum with correct extremum value!, but won't report a root!