Cho \(x=\dfrac{1}{3}\left(\sqrt[3]{\dfrac{23+\sqrt{513}}{4}}+\sqrt[3]{\dfrac{23-\sqrt{513}}{4}}-1\right)\) . Tính \(A=2x^3+2x^2+1\)

Tính \(A=2x^3+2x^2+1\). Với:

\(x=\frac{1}{3}\left(\sqrt[3]{\frac{23+\sqrt{513}}{4}}+\sqrt[3]{\frac{23+\sqrt{513}}{4}}-1\right)\)

Tính:

\(A=2x^3+2x^2+1\)

với \(x=\frac{1}{3}\left( \sqrt[3]{\frac{23+\sqrt{513}}{4}}+\sqrt[3]{\frac{23-\sqrt{513}}{4}}\right)-1\)

Tính A=\(2x^3+2x^2+1\)

biết x=\(\frac{1}{3}\left(\sqrt[3]{\frac{23+\sqrt{513}}{4}}+\sqrt[3]{\frac{23-\sqrt{513}}{4}}-1\right)\)

Cho x = \(\frac{1}{3}\left(\sqrt[3]{\frac{23+\sqrt{513}}{4}}+\sqrt[3]{\frac{23-\sqrt{513}}{4}}-1\right)\)

Tính A = \(\left(2x^3+2x+1\right)^{10}\)

Tính \(A=2x^3+2x^2+1\)với \(x=\frac{1}{3}\left(\sqrt[3]{\frac{23+\sqrt{513}}{4}}+\sqrt[3]{\frac{23-\sqrt{513}}{4}-1}\right)\)

Câu 1 :

 Cho  \(P=\left(1+\frac{\sqrt{x}}{x+1}\right):\left(\frac{1}{\sqrt{x}-1}-\frac{2\sqrt{x}}{x\sqrt{x}+\sqrt{x}-x-1}\right)\)

a) Rút gọn P

b) Tìm x để P < 2

Câu 2 :

Tính \(A=2x^3+2x^2+1\)

Với  \(x=\frac{1}{3}\left(\sqrt[3]{\frac{23+\sqrt{513}}{4}+\sqrt[3]{\frac{23-\sqrt{513}}{4}-1}}\right)\)

Hãy tính\(A=2x^3+2x^2+1\)

với \(x = \frac{1}{3}( \sqrt[3]{\frac{23+\sqrt{513}}{4}} +\sqrt[3]{\frac{23-\sqrt{513}}{4}}-1 ) \)

Tinh A = 2x³+ 2x²+1

voi x  = \(\frac{1}{3}\left(\sqrt[3]{\frac{23+\sqrt{513}}{4}}+\sqrt[3]{\frac{23-\sqrt{513}}{4}}-1\right)\)