1.

Which of the following case is assumed in a reverse curve?

A. Δ = Δ1 * Δ2
B. Δ = Δ2 – Δ1
C. Δ = Δ1 – Δ2
D. Δ = Δ1 + Δ2
Answer» D. Δ = Δ1 + Δ2


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