Apply Gaussian Elimination to Systems Without Unique Solutions
Use Gaussian $$\begin{array} { r r } x + y + z + w = & 7 \\3 x - 2 z + 5 w = & 11 \\- 4 x + 3 y + w = & 4 \\- x - y - z - w = & 6\end{array}$$

question 39

Multiple Choice

Apply Gaussian Elimination to Systems Without Unique Solutions
Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists.
- $$\begin{array} { r r } x + y + z + w = & 7 \\3 x - 2 z + 5 w = & 11 \\- 4 x + 3 y + w = & 4 \\- x - y - z - w = & 6\end{array}$$

• A) \(\varnothing\)
• B) \(\left\{ \left( \frac { 3 } { 2 } , 1 , \frac { 1 } { 3 } , - 2 \right) \right\}\)
• C) \(\left\{ \left( \frac { 7 } { 4 } , - \frac { 1 } { 2 } , 5 , - \frac { 1 } { 6 } \right) \right\}\)
• D) \(\left\{ \left( - 11 , \frac { 7 } { 19 } , \frac { 6 } { 19 } , - 4 \right) \right\}\)

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