⊥70[1/4]英翻汉1:time and effort will pay off 2:you can learn more by means of

it's an important time ()the family.1,for2,with3,in填什么详细解释 英语翻译1、nock sth.down 2、pridect the future 3、have an enterview 4、be unplesant with o 5、make a time for fun 6、the world cup 已知{an}中a1=1 且an+1=3an+4求an An Unforgettable Experience 用英语 简要介绍暑假中发生的一次难忘经历.内容包括：1、具体时间 2、地点3、事件 4、感受 词数 ：80左右 An Unforgettable ExperienceI had a happy time last summer vacatian .____________ 数列an,a1=4,an+1=5^n*an,求an用累乘法 数列an满足a1=2,an+1=4an+9,则an=? 在数列an中,a1=2,且an+1=4an-2,求an 数列an中 an>0 a1=2 an+1^2/4-an^2/4=1 求an 在数列{an}中,a1=1,an>0,an+1²=an²+4,则an= 英语翻译1、heavy rain for a time 2、make paris of3、We still expected your talk to last an hour 另外请解释下 last an hour. ⊥70[1/4]英翻汉1:time and effort will pay off 2:you can learn more by means of 同义句改写 1、I have little time for concerts.I ____ ____ have time for concerts.1、上面那题2、It took him an hour to write the letter.He ___ an hour ____ the letter.3、I didn't use to like English.I used ___ ____ English.4、I have been (1)swimming,I,afraid,the,of,in,sea,an.(2)time,I,have,to,sports,no,do.连词成句 time flies like an arrow 数列an 中 a1=4.an=(3an-1+2)/(an-1+4) 数列bn中,bn=(an-1)/(an+2) ,求bn 数列an 中 a1=4.an=(3an-1+2)/(an-1+4) 数列bn中,bn=(an-1)/(an+2) ,求bn 数列an中,a1=4,an+1=(3an+2)/(an+4),bn=an-1/an+2,求bn通项公式 已知数列{An}中,a1=4,an+1+an=6n+3,求证数列an-3n是等比数列,求证数列an的通项an