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1

Let \( C \) be the curve \( y=x^{3} \) (where \( x \) takes all real
P values). The tangent at \( A \) except \( (0,0) \) meets the

W curve again at \( B \). If the gradient at \( B \) is \( k \) times the gradient at \( A \), then \( \mathrm{k} \) is equal to
(1) 4
(2) 2
(3) -2
(4) \( \frac{1}{4} \)
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