Question

$Find \: the \: value \: of \alpha \: for \: which \: point \: ( \alpha , 2 \alpha + 1) \: doesn't \: lie \: outside \: the \: parabola \: y = x2 + x + 1.$

Answer:
$\alpha \: belongs \: to \: [0, 1]$
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Answer 1

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Ratio of the sides of the two figures (fig 2:fig 1) = 2:1

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