65. xyz + 1 = 0. 66. xy=y-z=z-x. 67.x=y=0. 68. y = z = 1.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
65 through 68 please
Transcribed Image Text:Problem IV Consider the set of all vectors (x, y, z) € R³ satisfying the following condi-
tions. Determine whether it is a subspace of the vector space R³ or not. Briefly explain.
61. x-y+z= 0.
62. x+y+z= 1.
63. x+y=x - 2z = 0.
64. x=y=z= 0.
65. xyz + 1 = 0.
66. x-y=y-z=z-x.
67.x=y=0.
68. y = z = 1.
69. x+y+2z ≥ 0.
70. x = y and z ≥ 0.
71. xy ≥ 0.
72. |x| = y.
73. ry20 and |x| = |y|.
74. z = x² - y².
75. z =
= x² + y².
76. x² + y² + z² = 1.
77. x(x - 1) = 0.
78. x² + 2y² + 1 = 0.
79. xyz = 0.
80. xy = y = 0.
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