(3) (a) Let v E R" be a nonzero vector. Show that P = is a projection matrix. (b) Let fi, f2, ..., fk be pairwise orthogonal nonzero vectors of R". Show that fi f P = + + is a projection matrix. ... (c) Show that the inverse of a projection matrix, when exists, is again a projection matrix.

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A: I have used a substitution and a formula.

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A: As per our company guidelines, we can solve first question for you. If you want other question to be...

Q: b.

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A: As per Bartleby guidelines we're supported to answer only first question when two or more different ...

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A: By Bartleby policy I have to solve only first one as these are all unrelated problems.These are all ...

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A: “Since you have asked multiple questions, we will solve the first question for you. If you want any ...

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A: Question Number 5Given:12(4x+18) = 3x+4  Find x = ?  

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A: We will solve this DE by using power series 

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