已知等差数列{an}满足a1+a2+a3+…+a11=0,则有( )
已知等差数列{an}满足a1+a2+a3+…+a101=0,则有( ) A.a1+a101>0 B.a2+a100<0
等差数列{an}满足a1+a2+a3+…a101=0,则有
已知数列an是等差数列,且a1+a2+a3+...+a10=10,a11+a12+a13+...+a20=20则a41+
已知{an}是等差数列,且a2+a3+a10+a11=48,则a6+a7=( )
已知等差数列{an}满足a1+a2+a3+……+a99=0则( ) A.a1+a99>0 B.a
已知数列an是等差数列 且a1+a2+a3+…+a10=10,a11+a12+a13+…+a20=20,则a41+a42
已知等比数列{an}满足a1=3,且4a1,2a2,a3成等差数列,则a3+a4+a5=( )
在等差数列{an}中,已知a1+a2+a3+a4+a5=20,则a3等于( )
已知{an}是等差数列,且a2+a3+a8+a11=48,则a6+a7=
已知{an}是等差数列,且a2+ a3+ a8+ a11=48,则a6+ a7= ( )
已知等差数列{an},且a2+a3+a10+a11=48,则a5+a8=
(1)已知等差数列{an},满足a1+a2+…+a101=0,则有