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# Differential equation help needed Tweet

Maths and statistics discussion, revision, exam and homework help.

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1. Differential equation help needed

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How did they go from t= (1/k)ln(20/20-kV) to the part below it?

Thanks
2. Re: Differential equation help needed
Just rearrange. Remembering that to get rid of ln you have to take the exponential
3. Re: Differential equation help needed
(Original post by sabre2th1)

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How did they go from t= (1/k)ln(20/20-kV) to the part below it?

Thanks
Since I guess you have an exam today I think it is acceptable to post full solution.