证明:若lim(x->+无穷)f(x)=0,且g(x)在(a,+无穷)有界,则lim(x->+无穷)f(x)g(x)=0
证明:若f(x)的极限是0,且g(x)在(a,正无穷)有界,则f(x)g(x)的极限等于0.
证明 :f(x)在(正无穷,负无穷)有定义,且f'(x)=f(x) ,f(0)=1 ,则f(x)=e^x
若f(x)和g(x)都是奇函数,且F(x)=f(x)+g(x)+2在(0,正无穷)上有最大值8,则在(负无穷,0)上F(
当x趋于正无穷时,lim f(x)=1.那么,连续函数f(x)在(0,正无穷)区间是有界的么?怎么证明
f(x)在正负无穷内可倒,且在x→∞时 limf '(x)=e,lim[ (x+c)/(x-c)]^x=lim[f(x)
问几个数学题,若F(x)=∫(x a)xf(t)dt 则F'(x)=?lim(x趋于无穷)[∫(x 0)t /(1+x)
f(x)在[a,+无穷)内可导,且lim[f(x)+kf'(x)]=l(x→∞)(k>0).证明:limf(x)=l,l
函数有界且可导设函数y=f(x)在(0,正无穷)内有界且可导,则 当x趋向正无穷时,limf'(x)存在时,必有lim(
若lim[f(x)+f'(x)]=0,x趋于正无穷且f'(x)在0到正无穷上连续,证明limf(x)=limf'(x)=
连续函数性质设f(x)在[a,正无穷)上连续,取正值,且lim(x趋近无穷)f(x)=0,证明必存在x0从属[a,正无穷
f(x)在【0,+无穷)上连续,在(0,+无穷)上可微,且f(x)的导数单调递增,f(0)=0,证明:g(x)=f(x)
证明 lim x-无穷大 cos2n/(n+1)=0 2.设数列xn有界 lim x-无穷 y