Hp 39gii:Using d/dx in solve

[lrdheat]

Wow! How are you getting your 39 gii to integrate the equation? On my unit, and for that matter, emulator, I get an invalid input if I integrate this particular function with any starting point <1. Any guesses as to what I might doing wrong?

Other functions are working fine...sin(x) 0 to pi produces 2, for example.