In each of Problems 21 through 23: (a) Draw a direction field for the given differential equation. How do solutions appear to behave as t becomes large? Does the behavior depend on the choice of the initial value a? Let ao be the value of a for which the transition from one type of behavior to another occurs. Estimate the value of ao. (b) Solve the initial value problem and find the critical value ao exactly. (c) Describe the behavior of the solution corresponding to the initial value ao. 2 21. y' – y = 2 cos t, y(0) = a
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In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
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Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
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Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
21 a,b,c
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