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If the system of linear equations. 8x + y + 4z = –2 x + y + z = 0 λ x – 3y = μ has infinitely many solutions, then the distance of the point ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ λ 2 1 ,– u , from the plane 8x + y + 4z + 2 = 0 is

1. 5 3
2. 4
3. 9 26
4. 3 10

Correct answer: 3 10

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