\( \mathrm{P} \) The length of the latusrectum of the hyperbola W \...

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\( \mathrm{P} \)
The length of the latusrectum of the hyperbola
W \( \frac{x^{2}}{a^{2}}-\frac{y^{2}}{b^{2}}=-1 \), is
(1) \( \frac{2 a^{2}}{b} \)
(2) \( \frac{2 b^{2}}{a} \)
(3) \( \frac{b^{2}}{a} \)
(4) \( \frac{a^{2}}{b} \)
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