2^x - 2^ (x-2) = 3(2^13)relaxin99 wrote:2^x - 2^ (x-2) = 3(2^13), what is the value of x?
9
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13
15
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2^(x-2) (2^2-1) =3* 2^13
2^(x-2) *3 = 3* 2^13
x-2=13 --> x=15
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Source: Beat The GMAT — Problem Solving |
2^(x-2) (2^2-1) =3* 2^13
2^(x-2) *3 = 3* 2^13
x-2=13 --> x=15
