Chứng minh rằng phương trình sau luôn có nghiệm với mọi tham số $m$:
$m{{\left( x+1 \right)}^{2}}{{\left( x-2 \right)}^{3}}+\left( x+2 \right)\left( x-3 \right)=0$.
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One modern wonder that I find fascinating is the Burj Khalifa in Dubai. It is currently the tallest building in the world, with a height of over 828 meters. The Burj Khalifa was officially opened in 2010 and has become a symbol of modern architecture and engineering. It has more than 160 floors and offers amazing views of the city from the observation decks. I think the Burj Khalifa is a great example of human creativity and ambition. It shows how technology and hard work can turn dreams into reality.
\(y'=7\left(-x^2+3x+7\right)^6.\left(-x^2+3x+7\right)'\)
\(=7\left(-2x+3\right)\left(-x^2+3x+7\right)^6\)