- Thread starter
- #1

#### karush

##### Well-known member

- Jan 31, 2012

- 2,648

$$a_1=\left[\begin{array}{r} 1\\3\\ -1 \end{array}\right],

a_2=\left[\begin{array}{r} -5\\-8\\2 \end{array}\right],

b =\left[\begin{array}{r} 3\\-5\\ \color{red}{h} \end{array}\right]$$

ok this should be obvious but I don't see it..