商家蚂蚁花呗怎么开通:1, P____is an animal in your home as your friend.
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parrot 鹦鹉
Pet
Pet
pet(宠物)!
1, P____is an animal in your home as your friend.
若an+1=an时叫什麽数列
Sn=1-an,求an
设数列(An=An的平方-n乘An+1,N是自然数,求An
已知数列{an}中,满足2an=3an-1 +4,求{an}
已知数列{an}中,满足2an=3an-1 +4,求{an}
anima sana in corpore sano 意思是什么?
请教术语:con anima、cresc?谢谢!
3:已知数列{An}中, An=1,A2=2,An+1=3An-2An-1,求通项An
已知数列{An}满足An+2=4An+2-4An,A1=2,A2=8证明{An+1-2An}是等比数列