Calculation: oZJHjP - 1

S_₂ =
S_₁* (1+ 2* α* Δ__t)

S_₂ = S_₁* (1+ 2* α* Δ__t) $S_{2}$ = $S_{1}\cdot (1+2\cdot \alpha\cdot \Delta_{t})$

S_₂ = S_₁+ 2* Δ__t* α* S_₁ $S_{2}$ = $S_{1}+2\cdot \Delta_{t}\cdot \alpha\cdot S_{1}$

S_₂ = S_₁+ 2* S_₁* Δ__t* α $S_{2}$ = $S_{1}+2\cdot S_{1}\cdot \Delta_{t}\cdot \alpha$