{xn}是各项不为1正项等比数列,{yn}满足yn*logx(n)a=2(a>0,且a≠1),设y4=17,y7=11,
等比数列xn各项均为正数,yn=2logaXn,a>0且a不等于1,n属于正整数.已知Y4等于17y五等于11求数列yn
已知等比数列{Xn}的各项为不等于1的正数,数列{Yn}满足Yn=2㏒aXn(a>0,a≠1),设γ4=17,γ7=11
已知等比数列Xn的各项均为正数,数列Yn满足Yn=logaXn,(a>0,a不等於0)且Y3=18,Y6=12,证明Yn
已知等比数列xn的各项都为不等于1的正数,x1=a^11,x3=a^9,数列yn满足ynlogxn a=2(其中n、xn
已知数列{Xn}满足Xn+1=Xn^2+Xn,X1=a(a-1),数列{Yn}满足Yn=1/(Xn+1),设Pn=X/(
设Xn≤a≤Yn,lim(n→∞)《Yn-Xn》=0,则Xn与Yn
X1=a>0,Y1=b>0,Xn+1=(Xn+Yn)/2,Yn+1=(Xn*Yn)^1/2,求证数列Xn,Yn收敛并求其
设Xn≤a≤Yn,lim(n→∞)(Yn-Xn)=0,则Xn与Yn的收敛?
“数列Xn,Yn满足lim(n->正无穷)Xn*Yn=0,若Xn有界则Yn必为无穷小 ” 这一命题正确吗 为什么
设{xn}是各项都为正数的等比数列,{yn}是等差数列,且x1=y1=1,x3+y5=13,x5+y3=21
设Xn是各项都为正数的等比数列,Yn是等差数列,且X1=Y1=1,X3+Y5=13,X5+Y3=21
limxn=a lim(yn-xn)=0 则数列{yn} n趋于无穷