求极限 1.lim(sinn-3n)/(5n+cosn) n趋向无穷求极限 1.lim(sinn-3n)/(5n+cosn) n趋向无穷 2.lim【(1+r)*(1+r^2)*(1+r^4)…(1+r^(2^n))】 n趋向无穷 r绝对值小于1 3.limXn n趋向无穷,其中X1>0,Xn+1=(2+3Xn)/1+Xn,n=1,2,3… 大写的X
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![求极限 1.lim(sinn-3n)/(5n+cosn) n趋向无穷求极限 1.lim(sinn-3n)/(5n+cosn) n趋向无穷 2.lim【(1+r)*(1+r^2)*(1+r^4)…(1+r^(2^n))】 n趋向无穷 r绝对值小于1 3.limXn n趋向无穷,其中X1>0,Xn+1=(2+3Xn)/1+Xn,n=1,2,3… 大写的X](/uploads/image/z/5410946-2-6.jpg?t=%E6%B1%82%E6%9E%81%E9%99%90+1.lim%28sinn-3n%29%2F%285n%2Bcosn%29+n%E8%B6%8B%E5%90%91%E6%97%A0%E7%A9%B7%E6%B1%82%E6%9E%81%E9%99%90+1.lim%28sinn-3n%29%2F%285n%2Bcosn%29+n%E8%B6%8B%E5%90%91%E6%97%A0%E7%A9%B7+2.lim%E3%80%90%EF%BC%881%2Br%29%2A%281%2Br%5E2%29%2A%281%2Br%5E4%29%E2%80%A6%281%2Br%5E%282%5En%29%29%E3%80%91+n%E8%B6%8B%E5%90%91%E6%97%A0%E7%A9%B7+r%E7%BB%9D%E5%AF%B9%E5%80%BC%E5%B0%8F%E4%BA%8E1+3.limXn+n%E8%B6%8B%E5%90%91%E6%97%A0%E7%A9%B7%2C%E5%85%B6%E4%B8%ADX1%3E0%2CXn%2B1%3D%282%2B3Xn%29%2F1%2BXn%2Cn%3D1%2C2%2C3%E2%80%A6+%E5%A4%A7%E5%86%99%E7%9A%84X)
求极限 1.lim(sinn-3n)/(5n+cosn) n趋向无穷求极限 1.lim(sinn-3n)/(5n+cosn) n趋向无穷 2.lim【(1+r)*(1+r^2)*(1+r^4)…(1+r^(2^n))】 n趋向无穷 r绝对值小于1 3.limXn n趋向无穷,其中X1>0,Xn+1=(2+3Xn)/1+Xn,n=1,2,3… 大写的X
求极限 1.lim(sinn-3n)/(5n+cosn) n趋向无穷
求极限
1.lim(sinn-3n)/(5n+cosn) n趋向无穷
2.lim【(1+r)*(1+r^2)*(1+r^4)…(1+r^(2^n))】 n趋向无穷 r绝对值小于1
3.limXn n趋向无穷,其中X1>0,Xn+1=(2+3Xn)/1+Xn,n=1,2,3…
大写的X后面跟的是下标
求极限 1.lim(sinn-3n)/(5n+cosn) n趋向无穷求极限 1.lim(sinn-3n)/(5n+cosn) n趋向无穷 2.lim【(1+r)*(1+r^2)*(1+r^4)…(1+r^(2^n))】 n趋向无穷 r绝对值小于1 3.limXn n趋向无穷,其中X1>0,Xn+1=(2+3Xn)/1+Xn,n=1,2,3… 大写的X
1.分子分母同除n 可得 极限的-3/5
2.原式=lim【(1-r)*(1+r)*(1+r^2)*(1+r^4)…(1+r^(2^n))】/(1-r )
=lim (1-r^4^n)/(1-r) =1/(1-r)
3.不好打 写下思路,先证明 数列有界限,再证明 数列 是单调的
这样后可得出limXn=limX(n+1) 代入题设式子 就好了