Parallel Vectors in 3D

Project ID: 
7500000179
Question: 
Select the triple of parallel vectors.
Header 1: 
$$\vec{u}$$
Header 2: 
$$\vec{v}$$
Header 3: 
$$\vec{w}$$
Text 11: 
$$(1;1;2)$$
Text 21: 
$$(2;2;4)$$
Text 31: 
$$(-2;-2;-4)$$
Text 12: 
$$(2;1;2)$$
Text 22: 
$$(0{,}5;0{,}25;0{,}5)$$
Text 32: 
$$\left(\frac{-2}{2};-\frac34;\frac{3}{-2}\right)$$
Text 13: 
$$(-0{,}2;3;0{,}75)$$
Text 23: 
$$\left(2;-30;-\frac{15}{2}\right)$$
Text 33: 
$$\left(\frac15;-3;-\frac34\right)$$
Text 14: 
$$(0;1;-1)$$
Text 24: 
$$\left(0;-\sqrt7;\sqrt7\right)$$
Text 34: 
$$\left(0;2\sqrt2;-\sqrt8\right)$$
Text 15: 
$$\left(\frac14;\frac{-5}{2};4\right)$$
Text 25: 
$$(5;-50;80)$$
Text 35: 
$$\left(-\frac12;5;-8\right)$$
Workflow: 
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