if 3 points A[P, 2). B[-3, 4]
and a [7, 1) are Collinar.
the value of e
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by the method of determinants | p 2 1 |
1/2 | -3 4 1 | =0
| 7 1 1 |
expanding along row1
1/2 p(4-1)-2(-3-7)+1(-3+28)=0
1/2 -3p-20+25=0
1/2 5=3p
1.5=3p
p=2.5/3
p=0.83squnits
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