f(x) = 2/√(x) + √(x) /2. Find the derivative.

a) f'(x) = -1/x(3/2) + 1/(4√(x) )
b) f'(x) = -1/(2√(x) ) + 1/(4√(x) )
c) f'(x) = -1/x(3/2) + 1/(2√(x) )
d) None of the above