Đề thi chính thức vào 10 môn Toán - hệ chuyên - Ch...

A a) \(S=\left\{ \pm \sqrt{2+\sqrt{3}};\pm \sqrt{2-\sqrt{3}} \right\}\)

b) \(\left( x;y \right)=\left( 4;1 \right)\) hoặc \(\left( x;y \right)=\left( 1;4 \right)\)

B a) \(S=\left\{ \pm \sqrt{3+\sqrt{3}};\pm \sqrt{3-\sqrt{3}} \right\}\)

b) \(\left( x;y \right)=\left( 4;1 \right)\) hoặc \(\left( x;y \right)=\left( 1;4 \right)\)

C a) \(S=\left\{ \pm \sqrt{2+\sqrt{3}};\pm \sqrt{2-\sqrt{3}} \right\}\)

b) \(\left( x;y \right)=\left( 4;2 \right)\) hoặc \(\left( x;y \right)=\left( 2;4 \right)\)

D a) \(S=\left\{ \pm \sqrt{2+\sqrt{2}};\pm \sqrt{2-\sqrt{2}} \right\}\)

b) \(\left( x;y \right)=\left( 4;-1 \right)\) hoặc \(\left( x;y \right)=\left( -1;4 \right)\)

A a) \(M=\frac{y}{y-x} \)

B a) \(M=\frac{x+y}{x} \)

C a) \(M=\frac{x-y}{y+x} \)

D a) \(M=\frac{x+y}{y-x} \)

A 500

B 506

C 555

D 526

A \(m=\frac{1+\sqrt{23}}{2}\)

B \(m=\frac{3+\sqrt{273}}{2}\)

C \(m=\frac{13+\sqrt{273}}{2}\)

D \(m=\frac{13-\sqrt{273}}{2}\)

A 1

B 2

C 3

D 4