1.等差数列{an}中,a2=9,a5=33,则{an}的公差为( )2.数列{an}是等差数列,a4=7,则S7=( )3.两个等差数列{an},{bn},a1+a2+…an/b1+b2+…bn=7n+2/n+3,则a5/b5=( )4.在等比数列{an}中,若a3=3,a9=75,则a10=( )5.在等比数列
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 14:13:43
![1.等差数列{an}中,a2=9,a5=33,则{an}的公差为( )2.数列{an}是等差数列,a4=7,则S7=( )3.两个等差数列{an},{bn},a1+a2+…an/b1+b2+…bn=7n+2/n+3,则a5/b5=( )4.在等比数列{an}中,若a3=3,a9=75,则a10=( )5.在等比数列](/uploads/image/z/9324340-52-0.jpg?t=1.%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%7Ban%7D%E4%B8%AD%2Ca2%3D9%2Ca5%3D33%2C%E5%88%99%7Ban%7D%E7%9A%84%E5%85%AC%E5%B7%AE%E4%B8%BA%EF%BC%88+%EF%BC%892.%E6%95%B0%E5%88%97%7Ban%7D%E6%98%AF%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%2Ca4%3D7%2C%E5%88%99S7%3D%EF%BC%88+%EF%BC%893.%E4%B8%A4%E4%B8%AA%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%7Ban%7D%2C%7Bbn%7D%2Ca1%2Ba2%2B%E2%80%A6an%2Fb1%2Bb2%2B%E2%80%A6bn%3D7n%2B2%2Fn%2B3%2C%E5%88%99a5%2Fb5%3D%28+%294.%E5%9C%A8%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%7Ban%7D%E4%B8%AD%2C%E8%8B%A5a3%3D3%2Ca9%3D75%2C%E5%88%99a10%3D%EF%BC%88+%EF%BC%895.%E5%9C%A8%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97)
xUNF~_^K#Mo6Pz)U(Z ڜ`H%Gimr+C6=ܵH؞ZJ<{|Qۯ;y>:4f[Ǐ`>:<_.7}*yL֠GT|<yy'F礞GA!dI4ܰoS˞l`>M(ϭnZ?q_Z_[BRGz ʝpӿ@,r
Ne _hGۧNWp