I need to find the first 2 orders of the taylor series on the expression below.
sqrt(Psi_s0 + Phi_t*exp((Psi_s0-2*Phi_F - V_SB)/Phi_t))
where Phi_t*exp((Psi_s0-2*Phi_F - V_SB)/Phi_t) is defined as Xi, and the taylor series is around Xi = 0.
I need to find the first 2 orders of the taylor series on the expression below.
sqrt(Psi_s0 + Phi_t*exp((Psi_s0-2*Phi_F - V_SB)/Phi_t))
where Phi_t*exp((Psi_s0-2*Phi_F - V_SB)/Phi_t) is defined as Xi, and the taylor series is around Xi = 0.
I'll try to elaborate. We are setting $\displaystyle \xi = \phi_{t}e^{\frac{\psi_{s0}-2\cdot\phi_f-V_{SB}}{\phi_t}}$
Then we are solving the series around $\displaystyle \xi = 0$
So I actually want expand an equation of the form $\displaystyle \sqrt{\psi_{s0}+\xi(\psi_{s0})}$ for $\displaystyle \xi(\psi_{s0})$, and I only need the first two terms, fortunately.