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设x1=2t+it-1×2t-1+it-2×2t-2+it-3×2t-3+…i2×22+i1×21+i0×20.x2=2t+i0×2t-1+it-1×2t-2+it-2×2设x1=2t+it-1×2t-1+it-2×2t-2+it-3×2t-3+…i2×22+i1×21+i0×20.x2=2t+i0×2t-1+it-1×2t-2+it-2×2t-3+…+i3×22+i2×21+i1×20.x3=2t+i1×2t-1+i0
题目详情
设x1=2t+it-1×2t-1+it-2×2t-2+it-3×2t-3+…i2×22+i1×21+i0×20.x2=2t+i0×2t-1+it-1×2t-2+it-2×2
设x1=2t+it-1×2t-1+it-2×2t-2+it-3×2t-3+…i2×22+i1×21+i0×20.
x2=2t+i0×2t-1+it-1×2t-2+it-2×2t-3+…+i3×22+i2×21+i1×20.
x3=2t+i1×2t-1+i0×2t-2+it-1×2t-3+…+i4×22+i3×21+i2×20.
x4=2t+i2×2t-1+i1×2t-2+i0×2t-3+it-1×2t-4+…+i5×22+i4×21+i3×20,…
以此类推构造无穷数列{xn},其中it=0或l(k=0,1,2,…,t-1,t∈N*),若x1=110,则
(1)x2=______.
(2)满足xn=x1(n∈N*,n≥2)的n的最小值为______.
设x1=2t+it-1×2t-1+it-2×2t-2+it-3×2t-3+…i2×22+i1×21+i0×20.
x2=2t+i0×2t-1+it-1×2t-2+it-2×2t-3+…+i3×22+i2×21+i1×20.
x3=2t+i1×2t-1+i0×2t-2+it-1×2t-3+…+i4×22+i3×21+i2×20.
x4=2t+i2×2t-1+i1×2t-2+i0×2t-3+it-1×2t-4+…+i5×22+i4×21+i3×20,…
以此类推构造无穷数列{xn},其中it=0或l(k=0,1,2,…,t-1,t∈N*),若x1=110,则
(1)x2=______.
(2)满足xn=x1(n∈N*,n≥2)的n的最小值为______.
▼优质解答
答案和解析
(1)∵x1=(1101110)2,
∴x2=(1010111)2,
∴x2=26+24+22+21+1=87;
(2)∵x3=(1101011)2,x4=(1110101)2,x5=(1111010)2,x6=(1011101)2,x7=(1101110)2,
∴满足xn=x1(n∈N+且n≥2)的n的最小值为7.
故答案为:87、7.
∴x2=(1010111)2,
∴x2=26+24+22+21+1=87;
(2)∵x3=(1101011)2,x4=(1110101)2,x5=(1111010)2,x6=(1011101)2,x7=(1101110)2,
∴满足xn=x1(n∈N+且n≥2)的n的最小值为7.
故答案为:87、7.
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