i = 1.00000e+001 r = 5.00000e+000 pr = 1.00000e+000 / (1.00000e+000 / r + 1.00000e+000 / r) = 2.50000e+000 u = i x pr = 2.50000e+001 p1 = i ^ 2.00000e+000 x pr = 2.50000e+002 p2 = u ^ 2.00000e+000 / pr = 2.50000e+002