diff --git a/College/AU 26/MATH 208 (Matrix Algebra)/Chapter 1.2 Notes.md b/College/AU 26/MATH 208 (Matrix Algebra)/Chapter 1.2 Notes.md index 66e212e..b11c3c0 100644 --- a/College/AU 26/MATH 208 (Matrix Algebra)/Chapter 1.2 Notes.md +++ b/College/AU 26/MATH 208 (Matrix Algebra)/Chapter 1.2 Notes.md @@ -31,8 +31,13 @@ - There can also be non-trivial solutions +To find when the system $$\begin{gathered} 3x_{1} + 6x_{2} = 2 \\ hx_{1} + 12x_{2} = k \end{gathered}$$ has no solutions $$\begin{bmatrix} 3 & 6 & 2 \\ h & 12 & k \end{bmatrix} \sim \begin{bmatrix} - -\end{bmatrix}$$ \ No newline at end of file +h & 2h & \frac{2h}{3} \\ h & 12 & k +\end{bmatrix} \sim \begin{bmatrix} +h & 2h & \frac{2h}{3} \\ 0 & 12 - 2h & k - \frac{2h}{3} +\end{bmatrix} $$ +There are no solutions the system of equations when there is no pivot in a row and the value on the right is not equal to zero (if the value on the right is also equal to zero than that equation is essentially $0=0$ which is always true). +This means that there are no solutions when $$12-2h = 0 \to h=6$$ and $$k-\frac{2h}{3} \ne 0$$ \ No newline at end of file