Explanation Definition used: Linear dependence and independence: “The functions f 1 , f 2 , … , f n are said to be linearly dependent on an interval I if there exists a set of constants k 1 , k 2 , … , k n not all zero, such that k 1 f 1 ( t ) + k 2 f 2 ( t ) + ⋯ + k n f n ( t ) = 0 for all t in I . The functions f 1 , f 2 , … , f n are said to be linearly independent on I if they are not linearly dependent there.” Theorem used: If the function p 1 , p 2 , … , p n are continuous on the open interval I , if the functions y 1 , y 2 , … , y n are solutions of the equation L [ y ] = y ( n ) + p 1 ( t ) y ( n − 1 ) + ⋯ + p n − 1 ( t ) y ′ + p n ( t ) y = 0 and if W ( y 1 , y 2 , … , y n ) ( t ) ≠ 0 for at least one point in I , then every solution of the equation L [ y ] = y ( n ) + p 1 ( t ) y ( n − 1 ) + ⋯ + p n − 1 ( t ) y ′ + p n ( t ) y = 0 can be expressed as a linear combination of the solution y 1 , y 2 , … , y n . And Wronskian of the function is W ( y 1 , y 2 , … , y n ) = | y 1 y 2 ⋯ y n y 1 ′ y 2 ′ ⋯ y n ′ ⋮ ⋮ ⋮ y 1 ( n − 1 ) y 2 ( n − 1 ) ⋯ y n ( n − 1 ) | . Calculation: Consider the function f 1 ( t ) = 2 t − 3 , f 2 ( t ) = 2 t 2 + 1 and f 3 ( t ) = 3 t 2 + t . The Wronskian of the above function can be calculated as follows

10th Edition

ISBN: 9780470458327

Author: William E. Boyce, Richard C. DiPrima

Publisher: Wiley, John & Sons, Incorporated

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Chapter 4.1, Problem 8P

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Whether the given functions are linearly dependent or linearly independent, if it is linearly dependent find the linear relation among them.

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Chapter 4.1, Problem 7P

Chapter 4.1, Problem 9P

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