Question

If x = root 40, find root x + 1/root x?

Answer 1

1.39763536439

This is because 
root 40 = about 6.32455532
so root 6.32455532 = 2.5148668593
now root x + 1/root x
    = 2.5148668593+1/ 2.5148668593
    = 3.5148668593/ 2.5148668593
    = 1.39763536439