If so, you can differentiate it with respect to Vd to prove Rd=\frac{Vt}{Id}.

[zaheerrafahi]

differentiate requested please

i want to differentiate this equation Id=IsxexponentVd/Vt with respect to Vd to prove Rd=Vt/Id

 

[nucl34rgg]

Remember that the derivative with respect to x of e^(kx) is ke^(kx) using the chain rule. Also remember that V=iR.

 

[shayaan_musta]

Does your equation look like as,
I_d=I_se^{\frac{V_d}{V_t}} ?