A planet is revolving around a very massive star in a circular orbit of radius r with a period of revolution T. If the gravitational force of attracti
A planet is revolving around a very massive star in a circular orbit of radius r with a period of revolution T. If the gravitational force of attraction between the planet and the star is proportional to `r^(-n),` then `T^(2)` is proportional to
A. `r^(n+1)`
B. `r^(n+2)`
C. `r^((n+1)//2)`
D. none
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