Question: 2. If d = [m, n, 1] is perpendicular to both = [5, 1, --21 and = [3, 3, 6], find m and n.

2. If d = [m, n, 1] is perpendicular to both =

[5, 1, --21 and = [3, 3, 6], find m and n.

2. If d = [m, n, 1] is perpendicular to both = [5, 1, --21 and = [3, 3, 6], find m and n. [3 marks]

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