Find the value of a for which points (a,2a+1) does not lie outside the parabola y=x^2+x+1)
Avni jain , 7 Years ago
Grade 11
Analytical Geometry> Find the value of a for which points (a,2...
1 Answers
Arun
Last Activity: 7 Years ago
Dear Avni
If a point lies inside the curve S,
Then
S1 should be less than 0
S1
Now
2a +1 - a² -a -1
a² -a>0
a(a-1) >0
Hence
a bongs to [1, infinity) and ( - infinity, 0]
Regards
Arun (askIITians forum expert)
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