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**1. The problem statement, all variables and given/known**

accordingto my calculus III textbook, the gravitational force acting on an object at ##x = <x,y,z>## is ##F(x)=-\frac{mMG}{|x|^3} x ##. What's the point of having a cube on the bottom. Why shouldn't I memorize it as ##F(x)=-\frac{mMG}{|x|^2} ##

according

## Homework Equations

See above