an+armchair+critic

郑依荀1003等差数列的公式是什么 -
郗行冠18189427863 ______ 差数列公式 等差数列公式an=a1+(n-1)d 前n项和公式为:存在am+an=ap+aq 若m+n=2p则;2 若m+n=p+q则;2 公差d=(an-a1)÷(n-1) 项数=(末项-首项)÷公差+1 数列为奇数项时;2 Sn=(a1+an)n/,求首尾项相加:Sn=na1+n(n-1)d/,前n项的和=中间项*项数 数列为偶数项:am+an=2ap 以上n均为正整数 文字翻译 第n项的值an=首项+(项数-1)*公差 前n项的和Sn=首项*n+项数(项数-1)公差/

郑依荀1003armchair -
郗行冠18189427863 ______ armchair [英]ˈɑ:mtʃeə(r) [美]ˈɑ:rmtʃer n. 扶手椅 adj. 脱离实际的;安逸的 [例句]The dog likes to sit in the big armchair.我们的狗喜欢坐在大扶手椅里.

郑依荀1003纸上谈兵的英文怎么说 -
郗行冠18189427863 ______ talk about stratagems on paper [例句] 我们最不需要的是纸上谈兵的评论家发表的“智慧”言论.The last thing we need are words of wisdom from an armchaircritic

郑依荀1003在数列an中,a1=5/6,an+1=(1/3)an+0.5^n 求an -
郗行冠18189427863 ______ 对 an+1 =(1/3)an + 0.5^n 变形,3 . 2^(n+1). an+1 = 2 . 2^n . an + 6 令 bn= 2^n . an 原式化为 3 bn+1 =2 bn + 6 两边减18 化为,3 ( bn+1 -6)=2 (bn -6) 令 Cn=bn -6 则上式,3 Cn+1=2 Cn 思路如上

郑依荀1003armchair造句 -
郗行冠18189427863 ______ 这里有. Qin used the strategy of sowing discord among the enemy to cause the Zhao commander Lian Po,an experienced general,to be replaced by an armchair strategist,Zhao Kuo.

郑依荀1003armchairs -
郗行冠18189427863 ______[答案] armchair 英[ˈɑ:mˌtʃeə] 美[ˈɑrmˌtʃɛr] n.扶手椅 adj.脱离实际的;安逸的 名词复数:armchairs [例句]The dog likes to sit in the big armchair. 我们的狗喜欢坐在大扶手椅里.

郑依荀1003用armchairs造句 -
郗行冠18189427863 ______[答案] our classroom have lots of armchairs

郑依荀1003修改They are sitting on the armchair.这句话 -
郗行冠18189427863 ______[答案] armchair是可数名词,意思是“扶手椅”.表示“坐在扶手椅上”应用介词in.故答案为: They are sitting in the armchair. 由于主语是They,所以他们不能坐在一把扶手椅上.如果改为为:They are sitting in the armchairs.会更好.

郑依荀1003修改They are sitting on the armchair.这句话 -
郗行冠18189427863 ______ armchair是可数名词,意思是“扶手椅”. 表示“坐在扶手椅上”应用介词in.故答案为:They are sitting in the armchair. 由于主语是They,所以他们不能坐在一把扶手椅上.如果改为为:They are sitting in the armchairs. 会更好.