一各项均为正数的等比数列,前N项和为S,前N项积为P,前N项倒数之和为M,A:P=S/MB:P>S/MC:P^2=(S/M)^ND:P^2>(S/M)^2
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![一各项均为正数的等比数列,前N项和为S,前N项积为P,前N项倒数之和为M,A:P=S/MB:P>S/MC:P^2=(S/M)^ND:P^2>(S/M)^2](/uploads/image/z/10331230-22-0.jpg?t=%E4%B8%80%E5%90%84%E9%A1%B9%E5%9D%87%E4%B8%BA%E6%AD%A3%E6%95%B0%E7%9A%84%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%2C%E5%89%8DN%E9%A1%B9%E5%92%8C%E4%B8%BAS%2C%E5%89%8DN%E9%A1%B9%E7%A7%AF%E4%B8%BAP%2C%E5%89%8DN%E9%A1%B9%E5%80%92%E6%95%B0%E4%B9%8B%E5%92%8C%E4%B8%BAM%2CA%EF%BC%9AP%3DS%2FMB%3AP%3ES%2FMC%3AP%5E2%3D%28S%2FM%29%5END%3AP%5E2%3E%28S%2FM%29%5E2)
一各项均为正数的等比数列,前N项和为S,前N项积为P,前N项倒数之和为M,A:P=S/MB:P>S/MC:P^2=(S/M)^ND:P^2>(S/M)^2
一各项均为正数的等比数列,前N项和为S,前N项积为P,前N项倒数之和为M,
A:P=S/M
B:P>S/M
C:P^2=(S/M)^N
D:P^2>(S/M)^2
一各项均为正数的等比数列,前N项和为S,前N项积为P,前N项倒数之和为M,A:P=S/MB:P>S/MC:P^2=(S/M)^ND:P^2>(S/M)^2
选择题嘛 分别取数列1,1,1,1……1,1,……与2,2,2,2,2……2,2,2,2,2验证得答案为C