Qualification > Math

A2 maths question need help

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nid404:
8iii) dh/dt=  Separate variables to get dh=dt then use previous part and integrate


-20h-ln(100-h)+ln(100+h)+C=t so t=-20h+ln((100+h)/(100-h))+C

when h=0, t=0
then C=0 and t=t=-20h+ln((100+h)/(100-h))


This is what astar answered in that thread

astarmathsandphysics:
Thanks nid

nid404:
anytime :)

loggerhead:
thanks guys much appreciated. I'm sure there will be more questions to come.

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