The planes 5x + y + 3z + 1 = 0 and x + y – kz + 6 = 0 are orthogonal, find k.

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answerhappygod
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The planes 5x + y + 3z + 1 = 0 and x + y – kz + 6 = 0 are orthogonal, find k.

Post by answerhappygod »

a) 4
b) 2
c) 6
d) 8
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