# Science:Math Exam Resources/Courses/MATH221/December 2007/Question 01

MATH221 December 2007

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### Question 01

Find a basis for the null space of the matrix

${\displaystyle A={\begin{pmatrix}2&-4&1&t\\1&-2&2&t\\1&-2&1&2t\\1&-2&1&t\end{pmatrix}}.}$