Use determinants to establish whether the points (2, 1), (1, −2)
and (−1, 1) are co-linear.
Use determinants to establish whether the points (2, 1), (1, −2) and (−1, 1) are co-linear.
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Use determinants to establish whether the points (2, 1), (1, −2) and (−1, 1) are co-linear.
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