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Official Specimen Paper 1 · Q11

Paper 1Algebra

The sum of the roots of the equation 22x−8×2x+15=02^{2x}-8\times2^x+15=0 is

A33
B88
C2log⁡1022\log_{10}2
Dlog⁡10(154)\log_{10}\left(\frac{15}4\right)
Elog⁡1015log⁡102\dfrac{\log_{10}15}{\log_{10}2}

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