MHB How to Construct a Segment of Length $\dfrac {1}{a^3}+\dfrac {1}{b^3}$?

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given :AB=1 and ,CD=a, EF=b

Can you construct a segment with length =$\dfrac {1}{a^3}+\dfrac {1}{b^3}$
 
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Albert said:
given :AB=1 and ,CD=a, EF=b

Can you construct a segment with length =$\dfrac {1}{a^3}+\dfrac {1}{b^3}$
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