Given \(v_{\text{B}} = -0.75c\) and \(v_{\text{A}} = 0.5c\), substitute these values into the formula:
\(v_{\text{B,A}} = \frac{-0.75c - 0.5c}{1 - \frac{-0.75c \cdot 0.5c}{c^2}}\).
\(v_{\text{B,A}} = \frac{-1.25c}{1 + 0.375}\).
\(v_{\text{B,A}} =
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