作者spss520 (剩下一个月啦)
看板trans_math
标题[考古] 93中正应数
时间Thu Feb 1 23:31:34 2007
1.
Find the maximum and minimum of f(x,y)= x^2 + 2x -y^2
on the set {(x,y):x^2+y^2≦4}
2.
Find the integral of f(x,y,z)=x-z over the region bounded by
z=y^2 , z=1 ,z=x and x=0
3.
Let {x_n} be a sequence that satisfies the condition
∣x_n - x_n+1 ∣≦ 1 n=1,2,3....
----
2^n
Prove that {x_n} is a Cauchy sequence
谢谢大家
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