Re: [理工] [數學]-台大106-資工所
※ 引述《jcyz (jason)》之銘言:
: 想問一下今天考的幾題怎麼解
: (應該要把握住的題目竟然不會orz)
: 若搞錯題意 敬請指教
: 3.
: (x,y)不等於(0,0), L為過(x,y)為(0,0)之直線,
: 求 R^2 在 L 上的 orthogonal projection 之 matrix representation
不會
: 4.
: f(x,y)=x0y0+... (等號右邊忘記長什麼樣子了QQ)
: (x0,x1)為standard coordinate ( (y0,y1) 亦為 standard coordinate)
: 令u=(1,0)
: 找一vector v 使 f(x,y)=s1*t1+s2*t2,
: 其中(s1,s2),(t1,t2)分別為u,v之coordinate(?)
--> 剛查了一下 是bilinear form
我寫v =+-(1/根號3, 1/根號3)
: 11(?).
: n為奇數, 求 C(n,0)+C(n,1)+...+C(n, (n-1)/2 )
2^(n-1)
--
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