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A, B, C, D, E are five coplanar points such that DA→+DB→+DC→+AE→+BE→+CE→=λDE→, Then λ =___________________.

Answer» A, B, C, D, E are five coplanar points such that DA→+DB→+DC→+AE→+BE→+CE→=λDE→, Then λ =___________________.


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