What is the component form of a unit vector in the opposite direction to vector v = i + 2j - 3k?
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What is the equation for the major axis of an ellipse centered at (h, k) with semi-major axis 'a' and semi-minor axis 'b'?
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What is the equation of the cubic function that has the characteristics of passing through the origin, having exactly one x-intercept and no y-intercept?