Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter4: Eigenvalues And Eigenvectors
Section4.2: Determinants
Problem 16AEXP
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This is a question from a linear algebra course: Let V = R[X]3, the polynomials of degree at most three, and B = {1, X, X2, X3}. Show what the image under fB is of:
• the four basic elements: P1(X) = 1, P2(X) = X, P3(X) = X2 and P4(X) = X3
• P(X) = 2 + 6X + 3X2 + 4X3

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what is the theorem or definition that you use when you compare both sides, I dont understand that step

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