2. 外语
  3. The sequence of numbers C1, C2, C3, … Cn…is defined by C1 = 1, C2 = 1, and Cn = 0.2Cn-1 for each integer n greater than 2. Quant

The sequence of numbers C1, C2, C3, … Cn…is defined by C1 = 1, C2 = 1, and Cn = 0.2Cn-1 for each integer n greater than 2. Quant

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问题 The sequence of numbers C1, C2, C3, … Cn…is defined by C1 = 1, C2 = 1, and Cn = 0.2Cn-1 for each integer n greater than 2.
Quantity A: C6
Quantity B: 253 × 0.210
选项 A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.
答案C
解析 C3=0.2，C4=0.22，C5=0.23，C6=0.24；
253×0.210=56×0.26×0.24=16×0.24=0.24。
C6=253×0.210，故答案为C。
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