an=2n-49
an
在等差數(shù)列{An}中,a1=-47,d=2,當(dāng)n為何值時(shí),Sn最小,并求出Sn的最小值
在等差數(shù)列{An}中,a1=-47,d=2,當(dāng)n為何值時(shí),Sn最小,并求出Sn的最小值
數(shù)學(xué)人氣:976 ℃時(shí)間:2020-06-14 01:28:45
優(yōu)質(zhì)解答
我來(lái)回答
類似推薦
- 在等差數(shù)列{an}中,a1=120,d=-4,若Sn≤an(n≥2),則n的最小值為_(kāi).
- 已知等差數(shù)列{an}中,a1=-12,d=2.求當(dāng)前n項(xiàng)和Sn取最小值是n的值
- 設(shè)等差數(shù)列{an}的前n項(xiàng)和為Sn,若a1=-11,a4+a6=-6,則當(dāng)Sn取最小值時(shí),n等于( ?。?A.6 B.7 C.8 D.9
- 等差數(shù)列{an}中,a1= -24 ,d=2,求Sn的最小值
- 已知等差數(shù)列{an}中,a1=-3,11a5=5a8,求前N項(xiàng)和Sn的最小值
- 函數(shù)f(x)=sinx-cosx^2的最小值是?
- 英語(yǔ)翻譯
- I took my grandpa to the hospital this morning,_____ I missed the first class.
- So crazy
- 方差是各個(gè)數(shù)據(jù)與平均數(shù)之差的平方的平均數(shù)
- 函數(shù)y=f(x)與它反函數(shù)y=f^-1(x)怎么讀?
- These are photos of my families.Look at them 改錯(cuò)
猜你喜歡
- 1平面與平面重合,是否屬于平行一類?那重合的兩直線,也屬于平行一類的嗎?
- 2非洲每年因饑餓死亡的人數(shù)及現(xiàn)在饑餓人口數(shù)量拜托各位了 3Q
- 3decide to do sth.還=什么
- 4(7/8)o you think of london?B:5.____london is one of the liveliest cities
- 5啤酒可以托運(yùn)嗎
- 6邊長(zhǎng)為2√6的等邊三角形的中心到一邊的距離為?
- 7please give your hand to help me
- 8已知2的X次方等于3的Y次方等于6的Z次方不等等于1,證明X分之一加Y分之一等于Z分之一.
- 9幫我做做?
- 10機(jī)械分析天平TG628A的使用說(shuō)明書
- 11in winter ,we wear warm coats to protect our bodies_.
- 12( )was most importance to her ,she told me,was her family it this what as