12 如圖所示理想放大器電路,R1 =1 kΩ 且 R2 =4 kΩ,vI =2 V 時 v0 為何?
(A) -0.7 V
(B) -8 V
(C) 0.7 V
(D)8V
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統計: A(1), B(16), C(1), D(0), E(0) #3185055
統計: A(1), B(16), C(1), D(0), E(0) #3185055