Question #38c69

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Question #38c69

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Answer 1 · 2015-12-30T19:48:12

A line $d$ is always contained in a plane.

Either $d$ is contained in a plane parrallel to the plane $alpha$ , and then $d nn alpha = O/$ .

Or $d$ is contained in a plan $beta$ that is not parallel to $alpha$ , in that case $beta nn alpha = gamma$ where $gamma$ is a line, and $gamma nn d != O/$ , which means the 2 lines intercept in 1 point, and this point is included in the plane $alpha$ . I hope you understood, don't hesitate to ask.

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Question #38c69

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