tsmith93 wrote:For any positive integer a: <<a>> = 1/2^(a+1)
What is the ratio of <<a+3>> to <<a>>?
<<a+3>> = 1/2^(a+3+1) = 1/2^(a+4) = 1/2^3 * 1/2^(a+1) = 1/2^3*<<a>>
=> <<a+3>>/<<a>> = 1/2^3 = 1/8
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Ratio
Source: Beat The GMAT — Problem Solving |
<<a+3>> = 1/2^(a+3+1) = 1/2^(a+4) = 1/2^3 * 1/2^(a+1) = 1/2^3*<<a>>
=> <<a+3>>/<<a>> = 1/2^3 = 1/8
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