K
kim_dang_91


1) [TEX]\frac{(1-2cosx)sinx}{(1+2cosx)(1-cosx)} = \sqrt{3}[/TEX]
2) [TEX]2x+1+x\sqrt{{x}^{2}+2}+(x+1)\sqrt{{x}^{2}+2x+3}=0[/TEX]
3) Giai he pt:
[TEX]\left\{\begin{matrix}x^{2}+1+y(x+y)=4y& \\ ({x}^{2}+1)(x+y-2)=y&\end{matrix}\right.[/TEX]
4) I=[TEX]\int_{e}^{{e}^{2}}\frac{1}{xlnx.ln(ex)}dx[/TEX]
J=[TEX]\int_{0}^{\frac{\pi }{4}}\frac{3sin4x}{\sqrt{{sin}^{2}2x+4{cos}^{2}2x}}dx[/TEX]
Huong dan chi tiet dum minh nha. Minh khong hieu cho lam'. May bai luong giac dung cong thuc gi vui long noi minh biet nha. Thanks cac ban
2) [TEX]2x+1+x\sqrt{{x}^{2}+2}+(x+1)\sqrt{{x}^{2}+2x+3}=0[/TEX]
3) Giai he pt:
[TEX]\left\{\begin{matrix}x^{2}+1+y(x+y)=4y& \\ ({x}^{2}+1)(x+y-2)=y&\end{matrix}\right.[/TEX]
4) I=[TEX]\int_{e}^{{e}^{2}}\frac{1}{xlnx.ln(ex)}dx[/TEX]
J=[TEX]\int_{0}^{\frac{\pi }{4}}\frac{3sin4x}{\sqrt{{sin}^{2}2x+4{cos}^{2}2x}}dx[/TEX]
Huong dan chi tiet dum minh nha. Minh khong hieu cho lam'. May bai luong giac dung cong thuc gi vui long noi minh biet nha. Thanks cac ban
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