Theo quy luật
\(S=1^3-3^3+5^3-7^3+...+2013^3-2015^3\)mới đúng
\(=...\)
\(=\left(1+\frac{1.3.5.9+2009.2013.2017.2021}{16}+8120432\right)-\left(\frac{-1.3.5.7+2011.2015.2019.2023}{16}+8136576\right)\)
\(=\frac{2009.2013.2017.2021-2011.2015.2019.2023}{16}-16128\)
\(2\sqrt{3+\sqrt{5-\sqrt{13+\sqrt{48}}}}\)
tinh gia tri bieu thuc
\(\sqrt{13+30\sqrt{2+\sqrt{9+4\sqrt{2}}}}\)
Tinh gia tri bieu thuc
cho tana+cota+3 tinh gia tri bieu thuc A=sina*cosa
tinh gia tri cua bieu thuc A=can3x^2-2xcan3+1 voi can3-1/can3
\(\sqrt{21-6\sqrt{6}}\)
tinh gia tri bieu thuc
tinh gia tri bieu thuc
n = ( 1 + can 3 + can 5 ) * ( 1 + can 3 - can 5)
tinh gia tri bieu thuc \(\sqrt{2000\times2001\times2002\times2004\times2005\times2006+36}\)
Tinh gia tri bieu thuc
\(\left(\sqrt{\frac{25}{16}-\sqrt{\frac{9}{16}}}\right):5\)
Tinh Gia tri bieu thuc \(\frac{1}{\sqrt{7-\sqrt{24}}+1}-\frac{1}{\sqrt{7+\sqrt{24}+1}}\)
