{An},{Bn}是等差数列,a1=25,b1=75,a2+b2=100,则a37+b37=____.
{An},{Bn}是等差数列,a1=25,b1=75,a2+b2=100,则a37+b37=____.
设数列{an}、{bn}都是等差数列,且a1=25,b1=75,a2+b2=100,则a37+b37等于( )
已知等差数列{an}和{bn},若a1=1,b1=3,a2+b2=10,求a37+b37=?
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=?
两个等差数列{an},{bn},a1+a2+...+an/b1+b2+...+bn=7n+2/n+2,则a5/b5=?
两个等差数列{an},{bn},a1+a2+a3+...+an/b1+b2+b3+...+bn=7n+2/n+3. 则a
等差数列{an}中,a1=2,公差是正整数,等比数列{bn}中,b1=a1,b2=a2.
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}、{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
两个等差数列{an},{bn},a1+a2+...+an/b1+b2+...+bn=7n+2/n+3,求a7/b7?急,
已知数列{an}是等差数列,且a1=1,公差为2,数列{bn}为等比数列且b1=a1,b2(a2-a1)=b1
已知数列{an}是等差数列,a1=1,公差为2,又已知数列{bn}为等比数列,且b1=a1,b2(a2-a1)=b1,求