Cho số thực $a$ thỏa mãn $a^5-a^3+a-2=0$
Chứng minh rằng:
$\dfrac{a^{16}+a^{12}+7a^8+12a^4+12}{a^{12}+7a^8+7a^4+12} < \sqrt[3]{4}$
Chứng minh rằng: $\dfrac{a^{16}+a^{12}+7a^8+12a^4+12}{a^{12}+7a^8+7a^4+12} < \sqrt[3]{4}$
Started By Oral1020, 18-11-2012 - 16:13
#1
Posted 18-11-2012 - 16:13
Oral1020
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Thịnh To Tướng
"If I feel unhappy,I do mathematics to become happy.
If I feel happy,I do mathematics to keep happy."
Alfréd Rényi
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