To evaluate the expression pi + x1/2 when x = 50, we can substitute 50 for x in the expression:
pi + x1/2 = pi + 501/2
Now we can simplify the expression by evaluating the square root:
pi + 501/2 = pi + sqrt(50)
So the value of the expression pi + x1/2 when x = 50 is approximately 11.069.