Cho mạch như hình vẽ 2, các tụ C ® ¥: BJT có hfe = 50, VBEQ = 0.7V
a) Tìm điểm Q của hinh 2. (2đ)
b) Vẽ DCLL, ACLL. (2đ)
c) Xác định lại RB sao cho sóng ra lớn nhất mà không bị méo.(2đ)
d) Tính vLmax tương ứng câu c.(1đ)
e) Xác định Zi, Zo, Av, Vimax (3đ

Can you show the

Jenny and fred both play a long note on their trombones. a stationary observer hears the sound increasing and decreasing repeatedly in loudness. which of these must be true? the sound waves from the two trombones have slightly different frequencies.the sound waves from the two trombones have the same frequency.the sound waves from the two trombones have slightly different amplitudes.the sound waves from the two trombones have the same wavelength.the sound waves from the two trombones have slightly different velocities.  lolthe answer is          the sound waves from the two trombones have slightly different frequencies.