设数列{an}和{bn}都是等差数列,且a1=25,b1=75,a2+b2=100.设CN=AN+BN,则C10=?
设数列{an}和{bn}都是等差数列,且a1=25,b1=75,a2+b2=100.设CN=AN+BN,则C10=?
设数列{an}、{bn}都是等差数列,且a1=35,b1=75,a2+b2=100,求数列{an+bn}的第37项的值
设数列an前n项和Sn=2n^2,bn为等差数列,且a1=b1,b2*(a2-a1)=b1.设cn=an/bn,求数列c
设数列{an}、{bn}都是等差数列,且a1=25,b1=75,a2+b2=100,则a37+b37等于( )
设数列{an}和{bn}都是等差数列,且a1=25,b1=75,a2+b2=100,那么由an+bn所组成的数列的第37
设数列{An}{Bn} 满足A1=B1= A2=B2=6 A3=B3=5且{An+1-An}是等差数列{Bn+1-Bn}
设数列{an}和{bn}都是等差数列,且a1=25,b1=75,a100+b100=100,则数列{an+bn}的前10
设数列{an}和{bn}都是等差数列,其中a1=25,b1=75,且a100+b100=100,则数列{an+bn}的前
设数列{an}、{bn}满足:a1=b1=6,a2=b2=4,a3=b3=3,且数列{an+1-an}是等差数列,{bn
设数列{an}和{bn}满足a1=b1=6,a2=b2=4,a3=b3=3 ,且数列{an+1-an}是等差数列
数列{an}前n项和为Sn=4-1/4^(n-1),数列bn为等差数列,且b1=a1,a2(b2-b1)=a1.设cn=
an前n和sn且sn=2-1/2的n-1次方{bn}为等差数列a1=b1,a2*(b2-b1)=a1 求bn通项?设cn