3. The graph of v = (x) - x + 2)' is shown below: 10 7 ) dy a) Find dix b) Verify, showing your work clearly, that 5. when x = -1 the curve has a point of inflexion and when x = 0 the curve has a maximum. The curve has a minimum wren x = d. -15 -10 -05 Find a and verify that this corresponds to a minimum. d) Find the gradient at (1. 8) and the equation of the tangent to the curve at this point