[考古] 96東華

[monyen (聞基起舞)]

If f(x) =   x      dt
          ∫  -----------
            2  √(1+t^4)

      -1
find(f )'(0)

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(反函數)

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→ Eliphalet:g(0) = 0 , g'(0) = 1/(f'(g(0)))
→ Eliphalet:g o f = f o g = identity mapping
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