In fact, the actual orbit that the GS entered was slightly elliptical, with its closest approach to Mars at 3.71 x 105 m above the Martian surface and a speed of 3.40 x 103 m/s at that point. Write down the equation (containing only one unknown) that could be solved to determine maximum altitude of the GS in this orbit.

In fact, the actual orbit that the GS entered was slightly elliptical, with its closest approach to Mars at 3.71 x 105 m above the Martian surface and a speed of 3.40 x 103 m/s at that point. Write down the equation (containing only one unknown) that could be solved to determine maximum altitude of the GS in this orbit.