The concentration, y, of a drug in the bloodstream t seconds after injection into a muscle is given byy = 3(e−7t − e−9t) for t ≥ 0. The concentration is maximum after t= ? seconds.

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter3: Polynomial And Rational Functions
Section3.1: Quadratic Functions And Models
Problem 56E: When a certain drug is taken orally, the concentration of the drug in the patient's bloodstream...
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The concentration, y, of a drug in the bloodstream t seconds after injection into a muscle is given by

y = 3(e−7t − e−9t) for t ≥ 0.

The concentration is maximum after t= ? seconds.

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