1 121 In Exercises 18-21, interpret the subset W of R³ geo- metrically by sketching a graph for W 2 [:] 20. W = {w: w=r r any real number} y = x²

Advanced Engineering Mathematics
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Chapter2: Second-order Linear Odes
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Linear algebra: please solve q20 correctly 

In Exercises 18-21, interpret the subset W of R³ geo-
metrically by sketching a graph for W.
18. W = {x: x =
19. W = {x: x=
0
X1
X2
a> 0}
x₁ = -x₂2x3}
20. W {w: w = r
[H]
0
29. The p
10 TI
r any real number}
y=x²
mod 21.
Transcribed Image Text:In Exercises 18-21, interpret the subset W of R³ geo- metrically by sketching a graph for W. 18. W = {x: x = 19. W = {x: x= 0 X1 X2 a> 0} x₁ = -x₂2x3} 20. W {w: w = r [H] 0 29. The p 10 TI r any real number} y=x² mod 21.
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