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Find the value of a for which points (a,2a+1) does not lie outside the parabola y=x^2+x+1)

Find the value of a for which points (a,2a+1) does not lie outside the parabola y=x^2+x+1)

Grade:11

1 Answers

Arun
25750 Points
6 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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