Equation supposedly proves dark matter, could you verify or find any defect?

[open hare]

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[wanton plover]

@pulsar viper please explain, what should I say to him

[winter trellis]

maybe the problem is 1/4 <= a <= 1/5 which has no solutions

[winter trellis]

also, are you trying to solve for k in terms of a, are you trying to prove that gravitational force actually shrinks at an order not equal to 2, and if so, why