The overall gain of multiple amplifiers in cascade can be expressed as__________ (A1, A2, A3 are individual gains)

The overall gain of multiple amplifiers in cascade can be expressed as

1.	The overall gain of multiple amplifiers in cascade can be expressed as__________ (A₁, A₂, A₃ are individual gains)
A.	A<sub>1</sub>-A<sub>2</sub>-A<sub>3</sub>
B.	A<sub>1</sub>+A<sub>2</sub>+A<sub>3</sub>
C.	A<sub>1</sub>/A<sub>2</sub>*A<sub>3</sub>
D.	A<sub>1</sub>A<sub>2</sub>A<sub>3</sub>
Answer» E.