Lösning till övning 3
SamverkanLinalgLIU
(Skillnad mellan versioner)
Rad 3: | Rad 3: | ||
<center><math>\boldsymbol{u}+\boldsymbol{v}=\underline{\boldsymbol{e}}\begin{pmatrix}{a_1}\\{b_1}\\{c_1}\end{pmatrix}+\underline{\boldsymbol{e}}\begin{pmatrix}{a_2}\\{b_2}\\{c_2}\end{pmatrix}=\underline{\boldsymbol{e}}\begin{pmatrix}{a_1+a_2}\\{b_1+b_2}\\{c_1+c_2}\end{pmatrix}</center></math> | <center><math>\boldsymbol{u}+\boldsymbol{v}=\underline{\boldsymbol{e}}\begin{pmatrix}{a_1}\\{b_1}\\{c_1}\end{pmatrix}+\underline{\boldsymbol{e}}\begin{pmatrix}{a_2}\\{b_2}\\{c_2}\end{pmatrix}=\underline{\boldsymbol{e}}\begin{pmatrix}{a_1+a_2}\\{b_1+b_2}\\{c_1+c_2}\end{pmatrix}</center></math> | ||
och | och | ||
- | <math>\lambda\boldsymbol{u}=\lambda\underline{\boldsymbol{e}}\begin{pmatrix}{a_1}\\{b_1}\\{c_1}\end{pmatrix}=\underline{\boldsymbol{e}}\begin{pmatrix}{\lambda a_1}\\{\lambda b_1}\\{\lambda c_1}\end{pmatrix}.</math> | + | |
+ | <center><math>\lambda\boldsymbol{u}=\lambda\underline{\boldsymbol{e}}\begin{pmatrix}{a_1}\\{b_1}\\{c_1}\end{pmatrix}=\underline{\boldsymbol{e}}\begin{pmatrix}{\lambda a_1}\\{\lambda b_1}\\{\lambda c_1}\end{pmatrix}.</center></math> |
Versionen från 14 augusti 2008 kl. 19.10
Låt \displaystyle \boldsymbol{u}=\underline{\boldsymbol{e}}X_1=\underline{\boldsymbol{e}}\begin{pmatrix}{a_1}\\{b_1}\\{c_1}\end{pmatrix} och \displaystyle \boldsymbol{v}=\underline{\boldsymbol{e}}X_2=\underline{\boldsymbol{e}}\begin{pmatrix}{a_2}\\{b_2}\\{c_2}\end{pmatrix}. Vi behöver summan
och
<center>\displaystyle \lambda\boldsymbol{u}=\lambda\underline{\boldsymbol{e}}\begin{pmatrix}{a_1}\\{b_1}\\{c_1}\end{pmatrix}=\underline{\boldsymbol{e}}\begin{pmatrix}{\lambda a_1}\\{\lambda b_1}\\{\lambda c_1}\end{pmatrix}.