roblem 2. Let U be the subspace of R4 defined by U = {(X1, X2, X3, x4) = R¹ : x2 = X1 + X3, X4 = 3X3}. a) Find a basis of U. b) Extend the basis in part (a) to a basis of R4. c) Find a subspace W such that R4 = UW.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
Section: Chapter Questions
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**Problem 2.** Let \( U \) be the subspace of \( \mathbb{R}^4 \) defined by

\[ U = \{ (x_1, x_2, x_3, x_4) \in \mathbb{R}^4 : x_2 = x_1 + x_3, \, x_4 = 3x_3 \}. \]

(a) Find a basis of \( U \).

(b) Extend the basis in part (a) to a basis of \( \mathbb{R}^4 \).

(c) Find a subspace \( W \) such that \( \mathbb{R}^4 = U \oplus W \).
Transcribed Image Text:**Problem 2.** Let \( U \) be the subspace of \( \mathbb{R}^4 \) defined by \[ U = \{ (x_1, x_2, x_3, x_4) \in \mathbb{R}^4 : x_2 = x_1 + x_3, \, x_4 = 3x_3 \}. \] (a) Find a basis of \( U \). (b) Extend the basis in part (a) to a basis of \( \mathbb{R}^4 \). (c) Find a subspace \( W \) such that \( \mathbb{R}^4 = U \oplus W \).
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