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The relation between time \( t \) and distance \( x \) is given by \( t=A x^{2}+B x \), where \( A \) and \( B \) are
\( \mathrm{P} \) constants. Then the
(A) velocity is given by \( \mathrm{v}=2 \mathrm{Ax}+\mathrm{B} \)
(B) velocity is given by \( v=(2 \mathrm{Ax}+\mathrm{B})^{-1} \)
(C) retardation is given by \( 2 \mathrm{Av}^{3} \)
(D) retardation is given by \( 2 \mathrm{Bv}^{3} \)
(1) Only (C)
(2) Only (D)
(3) Only (B) \& (C)
(4) Only (B) \& (D)
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