If 1) 2)If a = i + j + k, explain why it is not possible that a x b = i - j + 2k. Show that if a x b = xi + yj + zk, then x + y +z = 0 THanks
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Originally Posted by ashes If 1) ... Let b = (x, y, z) then you know: [1]: (1, 1, 1) * (x, y, z) = x + y + z = 8 [2]: #[2] will yield: (z-y, x-z, y-x) = (6, -7, 1) You'll get a system of simultaneous equations: Solve for (x, y, z). I've got: (x, y, z) = (0, 1, 7)
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