Đáp án mới nhất

4

Cho $\triangle$ABC, biết$ BC=5cm$, $AC+AC=7cm$, $AC-AB=1cm.$câu a: tinh $AC,AB$câu b: Goi $AH$ la đường cao cua $\triangle $ABC. Tính $HA, HB, HC$
5

Cho $\triangle$ABC, biết$ BC=5cm$, $AC+AC=7cm$, $AC-AB=1cm.$câu a: tinh $AC,AB$câu b: Goi $AH$ la đường cao cua $\triangle $ABC. Tính $HA, HB, HC$
0

$\left\{\begin{matrix} \sqrt{3+2x^{2}y-x^{4}y^{2}}+x^{4}(1-2x^{2})=y^{2} & & \\ 1+\sqrt{1+(x-y)^{2}}=x^{3}(x^{3}-x+2y^{2}) & & \end{matrix}\right.$
0

Nếu:$\begin{cases}a,b\in N^{*} \\ (a^{2}+b^{2})chia hết cho 3 \end{cases}$ thì $\begin{cases}achia hết cho 3 \\ b chia hết cho 3 \end{cases}$
1

Nếu:$\begin{cases}a,b\in N^{*} \\ (a^{2}+b^{2})chia hết cho 3 \end{cases}$ thì $\begin{cases}achia hết cho 3 \\ b chia hết cho 3 \end{cases}$
3

Tich phan $\int\limits_{0}^{1}\frac{(x-e^{2x})dx}{xe^x+e^{2x}}$
2

Giai phuong trinh $\dfrac{\sin 3x +\cos 3x}{1+2\sin 2x}=\cos 2x$
1

Giai phuong trinh $\dfrac{\sin 3x +\cos 3x}{1+2\sin 2x}=\cos 2x$
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