In: Math
Determine which of the following sets of vectors form a basis for R 3 . S = {(1, 0, −1),(2, 5, 1),(0, −4, 3)}, T = {(−1, 3, 2),(3, −1, −3),(1, 5, 1)}.
Solution:
Check whether is linearly independent.
Let
This in matrix form is
By
By
is linearly independent.
Check .
Let .
To find such that .
This in matrix form is
By
By
.
.
Hence, is the basis of .
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Check whether is linearly independent.
Let
This in matrix form is
By
By
Since the rank of the matrix is less than the number of unknown , there is free variable.
Since are not zero , is linearly dependent and hence not a basis of .