作者hothero (hothero)
看板trans_math
标题[考古] 多题考古题...
时间Thu Jul 3 12:16:25 2008
1.Please sketch the graph of 7x^2-6√3xy+13y^2-16=0
请问这题只能用线性代数解吗??还是有其他方法可以画出来呢??
2.Please analyze and graph the following
√x(x-5)^2
function f(x)=-------------
4
分析是要只要算出一微跟二微即可吗??
画图的话就是描点出来连起来??还是有何速解法呢@@?
3.Please find the area of the region outside the cardioid
r=1+cosθ and inside the circle r=√3sinθ
请问这题答案是√3吗??
4.Consider the polar equation r=4sin3θ
(b)Find the tangent lines at the pole
不懂到底该如何下手...
5.Locate the discontinuities of the function and illustrate by graphing.
y=ln(tan^2(x))
这题的图范围是要从-π/2 -> π/2 还是从 0 -> π呢??
画这种三角函数的图趋近於-∞还是∞要怎判断啊??
以上这五题烦请指教~谢谢^^
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