alleryStart learning →The plane through A(a) perpendicular to the vector n has equation
Ar · n = a · n
Br × n = a × n
Cr · a = n · a
Dr = a + λn
Answer & Solution
Correct answer: A. r · n = a · n
For P(r) on the plane, AP is perpendicular to n, so (r - a) · n = 0.
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