If the first-order implicit Euler scheme is used, the value at t+Δt/2 is replaced by the value at _________

If the first-order implicit Euler scheme is used, the value at t+Δt/

1.	If the first-order implicit Euler scheme is used, the value at t+Δt/2 is replaced by the value at _________
A.	t
B.	t-\(\frac{\Delta t}{2}\)
C.	t+Δt
D.	t-Δt
Answer» D. t-Δt

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