[理工] [工數]-99交大電機聯招
請問第3題
2 2
a).a linear operator T:R --> R , which is the orthogonal on the line y=2x.
以及第四題:
a)
the plane that passes throngh the point(-1,-5,5) and is perpendicular to
the line of the planes 5x+2y-7z=0 and z=0.
b)
the plane that passes throngh the point(-1,-5,5) and is contains
the line of intersection of the planes 5x+2y-7z=0 and z=0.
請問這三題都該怎麼解..
感覺是很基本的題目
但我考試完全想不到該怎麼著手...T_T
拜託各位高手
謝謝
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