## Question

###### Find an orthonormal basis of the kernel of the matrix \[A=\left[\begin{array}{llll}1 & 1 & 1 & 1 \\1 & 2 & 3 & 4\end{array}\right]\]

Find an orthonormal basis of the kernel of the matrix \[A=\left[\begin{array}{llll}1 & 1 & 1 & 1 \\1 & 2 & 3 & 4\end{array}\right]\]

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