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Let vecu be a vector on rectangular cood...

Let `vecu` be a vector on rectangular coodinate system with sloping angle `60^(@)` suppose that `|vecu-hati|` is geomtric mean of `|vecu| and |vecu-2hati|`, where `hati` is the unit vector along the x-axis . Then find the value of `(sqrt2- 1) |vecu|`

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