Giventhat the gradient of the tangent
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Given that the gradient of
2014-05-01 4:43 pm
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2014-05-01 5:15 pm
✔ 最佳答案
y(x)=ax^3+bx^2+3 => y(1)=a+b+3=4 => a+b=1y'(x)=3ax^2+2bx => y'(1)=3a+2b=7 => a+2=7a=5, b=1-a=-4(a,b)=(5,-4)......ans
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140501000010KK02412