pater+pan+was+right
@栾勤979：彼得潘故事概括要英语的 -
尤瑞18322533079…… There are many kids, imagine to play everyday, withour studying or growinb up. The main role Peter Pan ,in this book, was just a boy who want never to grow up. He lived in Neverland, like a heaven, there were sweet-sounding fairies, long-hair ...
@栾勤979：o为正多边形A1A2A3.An的中心,P为任意一点.证明:向量PA1+向量PA2+.+向量PAn=n向量PO - 作业帮
尤瑞18322533079…… [答案] O为正多边形A1A2A3.An的中心 => OA1+OA2+..+OAn=0 PA1+PA2+..+PAn =(OA1-OP)+(OA2-OP)+...+(OAn-OP) =(OA1+OA2+..+OAn)-n(OP) =-nOP =nPO
@栾勤979：英语填空(4月4日最迟) 给的词语有:fought help do called made wasPeter Pan was a boy who wouldn't grow up.He - __ - not an ordinary boy:he could fly ... - 作业帮
尤瑞18322533079…… [答案] peter pan was a boy who wouldn't grow up ,he was not an ordinary boy he could fly without wings . he once made friends with a girl called wendy and brought her to a magic island,never land ,for an adv...
@栾勤979：对于给定数列{cn},如果存在实常数p,q,使得cn+1=pcn+q对于任意n∈N*都成立,我们称数列{cn}是“M类数列 -
尤瑞18322533079…… (2)设 a(n+1)=pan+q 令bn=an +a(n+1) 则 bn=an+pan +q=(p+1)·an +q b(n+1)=(p+1)·a(n+1) +q=(p+1)·(pan+q) +q=(p+1)p·an +pq +2q=p[(p+1)·an +q] +2q=p·bn+2q 从而 {bn}也是“M类数列”,即数列{an+an+1}也是“M类数列”
@栾勤979：已知各项均为正数的数列{an}中,a1=1,sn是数列{an}的前n项的和对任意n属于正整数有2Sn=2pan^2+pan - p p是实 -
尤瑞18322533079…… (1)n=1时,2a1=2pa1+a1p-p 因为a1=1 所以P=1(2)2Sn=2An^2+An-1 2S(n-1)=2(An-1)^2+A(n-1)-1 所以2Sn-2S(n-1)=2An^2+An-2(An-1)^2-A(n-1)=2An 即2An^2-2A(n-1)^2=An+A(n-1) 2(An-A(n-1))=1 An-A(n-1)=1/2 所以An是等差数列 d=1/2 An=1...
@栾勤979：John+helped++Peter+lift++the++heavy++box+的被动形式?+ -
尤瑞18322533079…… Peter was helped to lift the heavy box
@栾勤979：已知各项均为正数的数列{an}中,a1=1,Sn是数列{an}的前n项和,对任意n∈N*,有2Sn=2pan2+pan - p(p∈R) -
尤瑞18322533079…… (1)由a1=1及2Sn=2pan2+pan-p(n∈N*),得:2=2p+p-p∴p=1…(4分) (2)由2Sn=2an2+an-1① 得2Sn-1=2an-12+an-1-1(n≥2,n∈N*) ② 由①-②得 2an=2(an2-an-12)+(an-an-1) 即:2(an+an-1)(an-an-1)-(an+an-1)=0∴(an+an-1)(2an-2an-1-1)=0 ...
@栾勤979：who was the author of peter pan的意思以及回答 -
尤瑞18322533079…… 谁是 Peter Pan 的作者? Peter Pan was created by Scottish novelist and playwright J. M. Barrie.
@栾勤979：Peter Pan was flying () the children () the sky两个括号里分别填什么 - 作业帮
尤瑞18322533079…… [答案] with in
尤瑞18322533079…… There are many kids, imagine to play everyday, withour studying or growinb up. The main role Peter Pan ,in this book, was just a boy who want never to grow up. He lived in Neverland, like a heaven, there were sweet-sounding fairies, long-hair ...
@栾勤979：o为正多边形A1A2A3.An的中心,P为任意一点.证明:向量PA1+向量PA2+.+向量PAn=n向量PO - 作业帮
尤瑞18322533079…… [答案] O为正多边形A1A2A3.An的中心 => OA1+OA2+..+OAn=0 PA1+PA2+..+PAn =(OA1-OP)+(OA2-OP)+...+(OAn-OP) =(OA1+OA2+..+OAn)-n(OP) =-nOP =nPO
@栾勤979：英语填空(4月4日最迟) 给的词语有:fought help do called made wasPeter Pan was a boy who wouldn't grow up.He - __ - not an ordinary boy:he could fly ... - 作业帮
尤瑞18322533079…… [答案] peter pan was a boy who wouldn't grow up ,he was not an ordinary boy he could fly without wings . he once made friends with a girl called wendy and brought her to a magic island,never land ,for an adv...
@栾勤979：对于给定数列{cn},如果存在实常数p,q,使得cn+1=pcn+q对于任意n∈N*都成立,我们称数列{cn}是“M类数列 -
尤瑞18322533079…… (2)设 a(n+1)=pan+q 令bn=an +a(n+1) 则 bn=an+pan +q=(p+1)·an +q b(n+1)=(p+1)·a(n+1) +q=(p+1)·(pan+q) +q=(p+1)p·an +pq +2q=p[(p+1)·an +q] +2q=p·bn+2q 从而 {bn}也是“M类数列”,即数列{an+an+1}也是“M类数列”
@栾勤979：已知各项均为正数的数列{an}中,a1=1,sn是数列{an}的前n项的和对任意n属于正整数有2Sn=2pan^2+pan - p p是实 -
尤瑞18322533079…… (1)n=1时,2a1=2pa1+a1p-p 因为a1=1 所以P=1(2)2Sn=2An^2+An-1 2S(n-1)=2(An-1)^2+A(n-1)-1 所以2Sn-2S(n-1)=2An^2+An-2(An-1)^2-A(n-1)=2An 即2An^2-2A(n-1)^2=An+A(n-1) 2(An-A(n-1))=1 An-A(n-1)=1/2 所以An是等差数列 d=1/2 An=1...
@栾勤979：John+helped++Peter+lift++the++heavy++box+的被动形式?+ -
尤瑞18322533079…… Peter was helped to lift the heavy box
@栾勤979：已知各项均为正数的数列{an}中,a1=1,Sn是数列{an}的前n项和,对任意n∈N*,有2Sn=2pan2+pan - p(p∈R) -
尤瑞18322533079…… (1)由a1=1及2Sn=2pan2+pan-p(n∈N*),得:2=2p+p-p∴p=1…(4分) (2)由2Sn=2an2+an-1① 得2Sn-1=2an-12+an-1-1(n≥2,n∈N*) ② 由①-②得 2an=2(an2-an-12)+(an-an-1) 即:2(an+an-1)(an-an-1)-(an+an-1)=0∴(an+an-1)(2an-2an-1-1)=0 ...
@栾勤979：who was the author of peter pan的意思以及回答 -
尤瑞18322533079…… 谁是 Peter Pan 的作者? Peter Pan was created by Scottish novelist and playwright J. M. Barrie.
@栾勤979：Peter Pan was flying () the children () the sky两个括号里分别填什么 - 作业帮
尤瑞18322533079…… [答案] with in
