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r = (t³ - 2t²)i (3t²)j
v = (3t² - 4t)i (6t)j
v(2) = (3.2² - 4.2)i (6.2)j
= (3.4 - 8)j (12)j
= (12 -8)i (12)j
= (4)i (12)j