For the op-amp circuit of Fig. 5.44, the op-amp has an open-loop gain of 100,000, an input resistance of 10 kΩ, and an output resistance of 100 Ω. Find the voltage gain Vi /Vo using the nonideal model of the op-amp
a)9.9×10³
b)1×10⁴
c)1×10⁵
d)1×10⁶