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X1x2+y1y2+z1z2. 3х+2у-5z -1. 2х(-3у)4z(-5t. 2х-3у-z=6 ответ.
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X1x2+y1y2+z1z2. 3х+2у-5z -1. 2х(-3у)4z(-5t. 2х-3у-z=6 ответ. 