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  • 03-02-2018
  • Mathematics
contestada

Is the line x = 6-7t, y = 1+2t, z= -7t parallel to the plane 2x+y+z?

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chloe62cosper1
chloe62cosper1 chloe62cosper1
  • 06-02-2018

In the formula of the distance between a point and a plane (not any plane but a plane parallel to the original one, equation [1] ), keeping D=2, and d as d itself, we get:

D=|ax1+by1+cz1+d|√a2+b2+c2
2=∣∣1⋅0+2⋅0+(−2)⋅(−12)+d∣∣√1+4+4
|d+1|=2⋅3 => |d+1|=6First solution:
d+1=6 => d=5
→x+2y−2z+5=0Second solution:
d+1=−6 => d=−7
→x+2y−2z−7=0
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