a) [6 pts] Let m, n > 1 be two integers. Find the derivative of f ( x ) = ( Vx) . Determine a real xo > 0 such that the graph of f has a horizontal tangent line at Xo. Does xo depend on n? b) [8 pts] Find g' (x) if g(x) = sin(2tan x) ((arcsin(x3)) )