Suppose an alien (i.e. SUPERMAN) has come to our world. He requires lowest voltage to perform a mysterious experiment. He created a special room in our world where the voltage at each spatial point in the room can be measured based on this special function: mysterious experiment. He created a special room in our world where the voltage at each spatial point in(a) Suppose an alien (i.e. SUPERMAN) has come to our world. He requires lowest voltage to perform ahe foom can be measured based on this special function: V (x,y,z) =2xJ + 3×92)Suppose SUPERMAN is standing at the point (x.y.z) = (2,5,7). In which side (or towards which point)should SUPERMAN go to find the lowest possible voltage in the room?%3D

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