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105. At what input voltage level does the output voltage level become numerically equal to the value of the differential gain of the amplifier?
(a) Vi1 = –Vi2 = 0.25 V
(b) V i1 = –V i2 = 0.50 V
(c) V i1 = –V i2 = 0.75 V
(d) V i1 = –Vi2 = 1.00 V
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