1.

∣∣∣∣xCrxCr+1xCr+2yCryCr+1yCr+2zCrzCr+1zCr+2∣∣∣∣−∣∣∣∣∣xCrx+1Cr+1x+2Cr+2yCry+1Cr+1y+2Cr+2zCrz+1Cr+1z+2Cr+2∣∣∣∣∣=

Answer» ∣∣
∣
∣
xCrxCr+1xCr+2yCryCr+1yCr+2zCrzCr+1zCr+2∣∣
∣
∣
−∣∣
∣
∣
∣
xCrx+1Cr+1x+2Cr+2yCry+1Cr+1y+2Cr+2zCrz+1Cr+1z+2Cr+2∣∣
∣
∣
∣
=



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