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Các bạn giúp dùm mình câu này nha Tìm giới hạn các hàm số sau: a/ lim x->1 x^2-2x+1 / x^3-x b/ lim x-> âm vc (x^3 - 2x^2 + 2x - 4) c/ lim x-> âm vc (căn bậc 2 2x + x^2 + căn bậc 3 x^3 - 1) d/ lim x->0 căn bậc 2 4x+1 - căn bậc 3 6x+1 / x^2 Cảm ơn ạ!
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simply-dirt-health-importance-quick-poison we are all destroying the earth the seas and rivers are too(1) to swim in there is so much smoke in the air that it is(2) to live in many of the world's cities in one well-known city for example(3) gases from cars pollute the air so much that policemen have to wear oxygen masks we have cut down so many trees that there are now vast areas of wasteland all over the world as a result farmers in parts of africa can not grow enough to eat in certain countries in asia there is so little rice moreover we do not take enough care of the countryside wild animals are(4) disappearing for instance tigers are rare in india now because we have killed too many for them to survive however it isn't so(5) to talk about the problem we must act now before it is too late to do anything about it join us now save the earth this is too(6) to ignore

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