Let \( u \equiv a x+b y+a \sqrt[3]{b}=0, v \equiv b x-a y+b \sqrt[3...

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Let \( u \equiv a x+b y+a \sqrt[3]{b}=0, v \equiv b x-a y+b \sqrt[3]{a}=0 \),
P \( a, b \in R \), be two straight lines. The equations of the

W. bisectors of the angle formed by \( k_{1} u-k_{2} v=0 \) and \( k_{1} u+k_{2} v=0 \), for nonzero and real \( k_{1} \) and \( k_{2} \), are
(1) \( u=0 \)
(2) \( k_{2} u+k_{1} v=0 \)
(3) \( k_{2} u-k_{1} v=0 \)
(4) \( v=0 \)
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