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D and E are points on the sides A B a...

`D` and `E` are points on the sides `A B` and `A C` respectively of a ` A B C` such that `D E B C` and divides ` A B C` into two parts, equal in area, find `(B D)/(A B)` .

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The correct Answer is:
`(2-sqrt2)/2`
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