shoushou
Apr 23, 2013, 07:33 PM
The flight path of a spacecraft is represented by the parabola y = x^2. If the engine is shut down at the point P (a, a^2), the spaceship will fly off along the tangent line at P. If the spaceship is moving from left to right, at what point should the engine be shut down in order for the spacecraft to move through point (4, 7)?