Determine the value of k such that the planes `2x-ky+2kz-4=0` and `3x+y-z=2` are perpendicular.

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You need to remember that if two planes are orthogonal, then the normal vectors to these planes are orthogonal.

The normal vector to the plane `2x-ky+2kz-4=0`  is `barv_1 = 2bari - k barj...

(The entire section contains 102 words.)

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