Find parametric equations for the tangent line to the curve

Question

Quiz 3 - Math 53, section 213

1. Find parametric equations for the tangent line to the curve given by parametric equations

x = 1 + 2√t, y = t³ - t, z = t³ + t, at the point (3, 0, 2).

2. Find the limit, if it exists, or show that the limit does not exist:

lim_{(x,y)→(0,0)}(x⁴ - 4y²/x² + 2y²).