How to derive the half life expression from the integrated rate law of a third order reaction?

David B

New member
Please help. No idea...
-d[A]/t = k[A]^3

For the integrated rate equation, I got 1/[A]^2 = 1/[A]^2 (initial) + 2kt

I have done a bit of research and it seems that the answer is either 1/2k[A]^2 or 3/2k[A]^2

If it is the first one, then it is easy, but if it is the last one I do not think I really know how to solve it.
 
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