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A patient is injected with a drug every 12 hours. Immediately before each injection the concentration...

A patient is injected with a drug every 12 hours. Immediately before each injection the concentration of the drug has been reduced by 90% and the new dose increases the concentration by 1.1 mg/L.

(a) What is the concentration after three doses?
mg/L

(b) If Cn is the concentration after the nth dose, find a formula for Cn as a function of n.
Cn =  


(c) What is the limiting value of the concentration?
mg/L

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