Svar 2.2:8

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(Ny sida: <math>2</math>'''b'''–'''c'''<math>+3</math>'''d'''<math>=2(3,-1)–(-2,4)+3(1,2)=(11,0)</math>; <math>e=\frac{(11,0)}{\sqrt{11^2+0^2}}=(1,0)=e_x</math>)
Nuvarande version (20 december 2017 kl. 10.51) (redigera) (ogör)
 
Rad 1: Rad 1:
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<math>2</math>'''b''''''c'''<math>+3</math>'''d'''<math>=2(3,-1)–(-2,4)+3(1,2)=(11,0)</math>;
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<math> 2\mathbf{b}\, \, \mathbf{c} + 3\mathbf{d} = 2(3, -1) – (-2, 4) + 3(1, 2) = (11, 0); </math>
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<math>e=\frac{(11,0)}{\sqrt{11^2+0^2}}=(1,0)=e_x</math>
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<math>\displaystyle \mathbf{e} = \frac{(11,0)}{\sqrt{11^2+0^2}} = (1,0) = \mathbf{e_x} </math>

Nuvarande version

\displaystyle 2\mathbf{b}\, –\, \mathbf{c} + 3\mathbf{d} = 2(3, -1) – (-2, 4) + 3(1, 2) = (11, 0);


\displaystyle \displaystyle \mathbf{e} = \frac{(11,0)}{\sqrt{11^2+0^2}} = (1,0) = \mathbf{e_x}