Answer:
i) 15 x2 y - 20 xy2 ... (ii) Similarly, g^-1(x) = 2x (since x = y/2 and hence y = 2x) ... that the interval of the domain (first coordinate) for which F(x) < 0 is just: -3 < x < 2 ... 4) The graph for the quadratic is sketched as the parabola in the uppermost graphic. ... We dispense with the negative root as unphysical, leaving c = 5 m