作者linda1218 (linda)
看板trans_math
标题95成大
时间Mon Jun 16 00:52:32 2008
lim(1/n)sigma(sqr((3i/n)^7 +(3i/n)^4)), i=1~n, n->oo
let f be a real valued function defined on R with f''>0 for all x
show that f(x)>=f(0)+f'(0)x
find the area of the region bounded by the curves
x^2-4xy+4y^2-2x-y-1=0, y=2/5
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