1103024305

Podoblast: 
Body a vektory
Část: 
A
Project ID: 
1103024305
Accepted: 
1
Clonable: 
0
Easy: 
0
Ve čtyřstěnu \( ABCD \) jsou vyznačeny vektory \( \overrightarrow{b} = \overrightarrow{AB} \), \( \overrightarrow{c} = \overrightarrow{AC} \), \( \overrightarrow{d} = \overrightarrow{AD} \), \( \overrightarrow{e} = \overrightarrow{AE} \) a \( \overrightarrow{f} = \overrightarrow{DE} \), kde \( E \) je střed hrany \( BC \). Vyjádřete vektory \( \overrightarrow{e} \) a \( \overrightarrow{f} \) jako lineární kombinaci vektorů \( \overrightarrow{b} \), \( \overrightarrow{c} \), \( \overrightarrow{d} \).
\( \overrightarrow{e} = \frac12\overrightarrow{b} + \frac12\overrightarrow{c};\ \overrightarrow{f} = \frac12\overrightarrow{b} + \frac12\overrightarrow{c} - \overrightarrow{d} \)
\( \overrightarrow{e} = \frac12\overrightarrow{b} + \frac12\overrightarrow{d};\ \overrightarrow{f} = \overrightarrow{b} + \overrightarrow{c} + \overrightarrow{d} \)
\( \overrightarrow{e} = \overrightarrow{b} + \overrightarrow{c};\ \overrightarrow{f} =\frac12\overrightarrow{b} + \frac12\overrightarrow{c} - \overrightarrow{d} \)
\( \overrightarrow{e} = \frac12\overrightarrow{b} + \frac12\overrightarrow{c};\ \overrightarrow{f} = \frac12\overrightarrow{b} + \frac12\overrightarrow{c} + \overrightarrow{d} \)