A.97dB.
B.86,9dB.
C.77dB.
D.97B.

A.2,0A.
B.3,5A.
C.2,5A.
D.1,8A.

A.\(e =  - 2{\rm{sin}}\left( {100\pi t + \frac{\pi }{4}} \right)V\)
B.\(e = 2{\rm{sin}}\left( {100\pi t + \frac{\pi }{4}} \right)V\)
C.\(e =  - 2\sin \left( {100\pi t} \right)V\)
D.\(e = 2\pi \sin \left( {100\pi t} \right)V\)

A.\(2,11{\rm{e}}V\)
B.\(4,22{\rm{e}}V\)
C.\(0,42{\rm{e}}V\)
D.\(0,21{\rm{e}}V\)

A.25,13cm/s
B.12,56cm/s
C.20,08cm/s
D.18,84cm/s

A.2
B.1
C.0,5
D.1,5

A.20cm.
B.30cm.
C.10cm.
D.40cm.

A.\(\frac{{\sqrt 3 }}{2}\)
B.\(\frac{1}{2}\)
C.\(\frac{{2\sqrt 3 }}{{\sqrt {13} }}\)
D.\(\frac{1}{{\sqrt {13} }}\)

A.\(x - 1\)
B.\(x + 1\)
C.\(1 - x\)
D.\(1 + x\)

A.\(\dfrac{{11}}{2}\)
B.\(\dfrac{9}{2}\)
C.\(\dfrac{{11}}{4}\)
D.\(\dfrac{9}{4}\)