An amplifier has a gain-bandwidth product of 200 MHz.A feedback network is added that has a feedback factor（1 + βA） of 18.88.What is the gain-bandwidth product for the circuit with the added feedback network？（）

An amplifier has a gain-bandwidth product of 200 MHz.A feedback network is added that has a feedback factor（1 + βA） of 18.88.What is the gain-bandwidth product for the circuit with the added feedback network？（）
A.10.59 MHz
B.18.88 MHz
C.200 MHz
正确答案：200 MHz