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Ask experts Expert Question: the points (a+1<1) , (2a+1,3) and (2a+2,2a) are collinear for what value of a?
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[Post New] 20 Apr 2010 10:34:02 IST
   Subject: the points (a+1&lt;1) , (2a+1,3) and (2a+2,2a) are collinear for what value of a?
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pravesh singh (0)

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the points (a+1<1) , (2a+1,3) and (2a+2,2a) are collinear for what value of a?
    
[Post New] 20 Apr 2010 11:05:11 IST
   Subject: the points (a+1&lt;1) , (2a+1,3) and (2a+2,2a) are collinear for what value of a?
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Deepak Aggarwal (3759)

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As the three points are collinear,

 

So, (a) (2a - 1) - (2) (a + 1) = 0

or, 2a2 - 3a - 2 = 0

or, (2a - 1) (a + 2) = 0

or, a = 1/2 , or a = -2 (Ans)......
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