Đề thi HK1 Toán 9 - Bắc Từ Liêm - Hà Nội - Năm 201...

A \(A = \frac{1}{2}\)

B \(A = \frac{2}{3}\)

C \(A = \frac{3}{4}\)

D \(A = \frac{4}{5}\)

A \(P = \frac{2}{{\sqrt x  - 2}}\)

B \(P = \frac{{\sqrt x }}{{\sqrt x  + 2}}\)

C \(P = \frac{{\sqrt x }}{{\sqrt x  - 2}}\)

D \(P = \frac{2}{{\sqrt x  + 2}}\)

A \(0 < x < 16\)

B \(0 < x < 4\)

C \(4 < x < 16\)

D \(0 < x < 16\,\,;\,\,x \ne 4\)

A \(5\sqrt 2 \)

B \(4\sqrt 2 \)

C \(3\sqrt 2 \)

D \(2\sqrt 2 \)

A \(S = \left\{ {1;\,2} \right\}\)

B \(S = \left\{ {1;\;3} \right\}\)

C \(S = \left\{ {2;\,3} \right\}\)

D \(S = \left\{ {0;\,1} \right\}\)

A \(x = 2\)

B \(x = 3\)

C \(x = 4\)

D \(x = 1\)

A \(\begin{array}{l}1)\,\,m = 3\\2)\,\,\frac{{3\sqrt 2 }}{2}\end{array}\)

B \(\begin{array}{l}1)\,\,m = 2\\2)\,\,\frac{{5\sqrt 2 }}{2}\end{array}\)

C \(\begin{array}{l}1)\,\,m = 2\\2)\,\,\frac{{3\sqrt 2 }}{2}\end{array}\)

D \(\begin{array}{l}1)\,\,m = 3\\2)\,\,\frac{{5\sqrt 2 }}{2}\end{array}\)

A \({P_{\min }} = 7\)

B \({P_{\min }} = 8\)

C \({P_{\min }} = 9\)

D \({P_{\min }} = 10\)