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Seja P(x,y) um ponto da elipse !$ \dfrac{x^2}{a^2} + \dfrac{y^2}{b^2} = 1 !$, de focos !$ F_1 !$ e !$ F_2 !$ e excentricidade e. Calcule !$ \vec{PF_1} . \vec{PF_2} !$ e assinale a opção correta.
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Which is the correct option to complete the sentence below?
Abandoned dog now works at a petrol station
Buying petrol is generally a trivial activity. You fill your car, head into the shop, possibly pick a Kit- Kat or motoring atlas, pay the cashier then set for your destination. Wouldn't the whole process be more enjoyable if there was a dog to brighten up your visit?
(Adapted from http://WIWoI.telegraph,co.uklpets/news-features/dogabandoned- petrol-station-now-works-petrol-statlonl)
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Caderno Container