Đề thi HK1 Toán 9 - Sở GD&ĐT Bến Tre - Năm 2017 -...

A \(a)\,\,42\)

B \(a)\,\,45\)

C \(a)\,\,48\)

D \(a)\,\,40\)

A \(\begin{array}{l}a)\,\,m > \frac{{ - 1}}{2}\\b)\,\,m = \frac{5}{2}\end{array}\)

B \(\begin{array}{l}a)\,\,m < \frac{{ - 1}}{2}\\b)\,\,m = \frac{7}{2}\end{array}\)

C \(\begin{array}{l}a)\,\,m < \frac{1}{2}\\b)\,\,m = \frac{{ - 7}}{2}\end{array}\)

D \(\begin{array}{l}a)\,\,m > \frac{1}{2}\\b)\,\,m = \frac{{ - 5}}{2}\end{array}\)

A \(80\) tầng

B \(75\) tầng

C \(70\) tầng

D \(60\) tầng

A \(\begin{array}{l}AB = 2\sqrt 3 a\\AC = 2a\end{array}\)

B \(\begin{array}{l}AB = \sqrt 3 a\\AC = \frac{1}{2}a\end{array}\)

C \(\begin{array}{l}AB = a\\AC = 3a\end{array}\)

D \(\begin{array}{l}AB = \sqrt 3 a\\AC = a\end{array}\)