Voltage follower circuit with zener diode and Multisim simulation

[moe619]

Vout = A (V₊  ̶ V₋) never seen this formula is it the same as Vout=Av*Vin

V=IR
5=I x 10k
I= 0.0005 A

 

[NascentOxygen]

Vout = A (V₊  ̶ V₋) never seen this formula is it the same as Vout=Av*Vin

The op-amp triangle shows two inputs. What is Vin?

V=IR
5=I x 10k
I= 0.0005 A

That looks right.