阿摩線上測驗
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阿摩線上測驗
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6. (20%) Let f(x,y) = 3x2 + y.
(d) (5%) Notice that i + 4j is a direction vector for the line y=4x-4 and this line is tangent to the parabola y=x2 at (2,4). Explain why the computations in ( a ), ( b ), and( c ) yield different values.