If `vec(x) * vec(a) =0 = vec(x)* vec(b) = vec(x) * vec(c)` for some non-zero vector `vec(x)`, then `vec(a) ,vec(b)

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Q 2213645540.     If `vec(x) * vec(a) =0 = vec(x)* vec(b) = vec(x) * vec(c)` for some non-zero vector `vec(x)`, then

`vec(a) ,vec(b) ,vec(c)` form a parallelopiped whose volume is `1` cubic unit

if `| vec(a) | =| vec(b) | = | vec(c) | =1`
A True
B False

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(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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