Question 446548
a) {{{3/x = 3x^(-1)}}} ==> derivative is {{{3*(-1)*x^(-2) = -3x^(-2)}}}.

b)  {{{2*(1/(2sqrt(x))) = 1/sqrt(x)}}}


c)  {{{1/sqrt(x) = x^(-1/2)}}} ==> derivative is {{{(-1/2)x^(-1/2 - 1) = (-1/2)x^(-3/2) = -1/(2x^(3/2))}}}