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OpenStudy (anonymous):
If three points (x1,y1),(x2,y2) and (x3,y3) lie on the same line,prove that [y2-y3/x2x3 ]+[ y3 -y1 /x3x1]+[y1-y2/x1x2 ]= 0
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OpenStudy (stamp):
\[\frac{y_{2}-y_{3}}{x_{2}x_{3}}+\frac{y_{3}-y_{1}}{x_{3}x_{1}}+\frac{y_{1}-y_{2}}{x_{1}x_{2}}=0\]
OpenStudy (anonymous):
how to prove this.
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