2022八年级下册英语周报42期答案

18【答案】(1)解:设等比数列的公比为q,由的1=2a4=16得16=2,解得q=2∴an=a1q分解:由(1)知an=2,得a2=4a=32…b2=4b=32,分j+d=4b1=0设等差数列{b的公差为d,则b1+8d=32解得d=410分n(m-1)Sn= nbd=2n2-2n2分

第二节The boy went home and thought about it long and hard. He asked his father what he should do. His fathesaid,"Look, son. you have to make up your own mind on this. However, I think it is a very important decisionfor you. "Finally, after sitting with it for a week, the boy turned in the same paper, making no changes at all.He stated, "You can keep the F and I'll keep my dream.Yes, I'm exactly the boy! I still have that school paper. The best part of the story is that two summers agothat same schoolteacher brought 30 kids to camp out on my ranch for a week. The teacher said when leavingLook, Monty, when I was your teacher, I was something of a dream stealer. During those years I stole a lot ofkids' dreams. Fortunately you had enough courage not to give up on yours. "Dont let anyone steal your dreams.Follow your heart, no matter what

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