Chemical Reactions When certain kinds of chemicals are combined, the rate at which the

Chapter 2, Problem 42

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Chemical Reactions When certain kinds of chemicals are combined, the rate at which the new compound is formed is modeled by the autonomous differential equation where k 0 is a constant of proportionality and 0. Here X(t) denotes the number of grams of the new compound formed in time t. (a) Use a phase portrait of the differential equation to predict the behavior of X(t) as t : . (b) Consider the case when . Use a phase portrait of the differential equation to predict the behavior of X(t) as t : when X(0) . When X(0) . (c) Verify that an explicit solution of the DE in the case when k 1 and is X(t) 1(t c). Find a solution that satisfies X(0) 2. Then find a solution that satisfies X(0) 2. Graph these two solutions. Does the behavior of the solutions as t : agree with your answers to part (b)?

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