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**qzno** 1. In the following case, determine whether or not **u** is in the plane spanned by **v** and **w**.

**u** = $\displaystyle \left(\begin{array}{cc}13\\7\end{array}\right)$ , **v** = $\displaystyle \left(\begin{array}{cc}-5\\6\end{array}\right)$ , **w** = $\displaystyle \left(\begin{array}{cc}4\\9\end{array}\right)$

What I was thinking I had to do was do the following:

$\displaystyle \left(\begin{array}{cc}x\\y\end{array}\right)$ = a$\displaystyle \left(\begin{array}{cc}-5\\6\end{array}\right)$ + b$\displaystyle \left(\begin{array}{cc}4\\9\end{array}\right)$

and then from here I would solve for a and b but I have no idea if it's right

Thanks in advance to whoever helps!