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Let the function y be defined by y (x) = x \sin (x) on [- \pi, \pi]. The minimum value of the function is? Solve for x: 2 + 8 - x = -24? What does it mean a rest mass? How does a 2 sphere compare to a 3 sphere are they both simply connected? Is Einstein field Equation a universal equation that can be readily solved as compared to Newton gravity boundary equation constant G?