Cho e hỏi ngu phát: 1 coin= bnhieu xu

Giai he phuong trinh

\(\left\{{}\begin{matrix}\left(\dfrac{x}{y}+\dfrac{y}{x}\right)\left(x+y\right)=15\\\left(\dfrac{x^2}{y^2}+\dfrac{y^2}{x^2}\right)\left(x^2+y^2\right)=85\end{matrix}\right.\)

\(\sqrt{x+4}-\sqrt[3]{1-x}=1\)

Giai phuong trinh

\(\sqrt{x+4}-\sqrt[3]{1-x}=1\)

\(\dfrac{sin35^o}{sin25^o}=...=...\)

\(\dfrac{sin35^o}{sin25^o}=...\)

chi tiet de hieu

Nếu 70=0

        11=1

         25=10

thì 30=?

1(2)2

3(12)4

5(1225)7

1(...)4