П_О_М_О_Г_И_Т_Е_ ♥♥♥ П_О_Ж_А__Л_У_Й_С_Т_А))) ₪₪₪ ₪₪₪ ₪₪₪ ₪₪₪ ₪₪₪ ₪₪₪ ₪₪₪ ₪₪₪
Определить, при каком значении В плоскости x - 4y+z- 1= 0 и 2x + By+10z - 3 = 0 будут перпендикулярны.
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