南充高二期末真题数学解答。
s0=1,n0=0,m0=.5,
s1=.5,m1=1/4,n1=1,(s 1 & gt;t)
sn=sn-1-mn-1,mn=(1/2)^(n+1),nn=n
所以sn = sn-1-(1/2) n,容易求出sn = (1/2) n,
(1/2)^n≤0.01 2^n≥100,n≥7
s1=.5,m1=1/4,n1=1,(s 1 & gt;t)
sn=sn-1-mn-1,mn=(1/2)^(n+1),nn=n
所以sn = sn-1-(1/2) n,容易求出sn = (1/2) n,
(1/2)^n≤0.01 2^n≥100,n≥7