Which of the following functions do not form a set of fundamental solutions of y" - 4y = 0 Select one: O a. (e21,e21 +e-21) O b. {e?t - e-21,e-21 -e2) C. {e?1 +e-21,e2t - e-21) d. {e-2",e2)

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A: Since you have asked multiple questions in a single request so we will be answering only first…

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A: To differentiate the given function

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A: Solved below

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