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The slope of graph in figure at point \( A, B \) and \( C \) is \( m_{\mathrm{A}} . m_{\mathrm{B}} \) and \( m_{\mathrm{C}} \) respectively, then:
\( \mathrm{P} \)
W.
(A) \( m_{\mathrm{A}}m_{\mathrm{B}}m_{\mathrm{C}} \)
(B) \( m_{\mathrm{A}}m_{\mathrm{B}}m_{\mathrm{C}} \)
(C) \( m_{\mathrm{A}}=m_{\mathrm{B}}=m_{\mathrm{C}} \)
(D) \( m_{\mathrm{A}}=m_{\mathrm{B}}m_{\mathrm{C}} \)
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