6. Which of the following are subspaces of R° ? (x, y, z all bclong to R) (i) W {(x, y, z): x + y + z = 0} %3! (ii) W {(x, y, z): x 2 0} %3D (iii) W = {(x» y» z): x² + y³ + z² s 1}

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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6.
Which of the following are subspaces of R ? (x, y, z all belong to R)
(i) W
{(x, y, z): x + y + z = 0}
{(x, y, z): x 2 0}
(iii) W = {(x» y, z): x² + y² + ?<1}
%3D
(ii)
W
%3D
(iv) W
{(x, y, z): x, y, z are rationals}
{(x> 0, z)}
(vi) W = {(x» y» z), y² = x + z}
(v) W
(vii) W
{(x» y, z), 2x + 3y – 4z = 0}
Transcribed Image Text:6. Which of the following are subspaces of R ? (x, y, z all belong to R) (i) W {(x, y, z): x + y + z = 0} {(x, y, z): x 2 0} (iii) W = {(x» y, z): x² + y² + ?<1} %3D (ii) W %3D (iv) W {(x, y, z): x, y, z are rationals} {(x> 0, z)} (vi) W = {(x» y» z), y² = x + z} (v) W (vii) W {(x» y, z), 2x + 3y – 4z = 0}
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