TMUA 2020 Paper 1 Q15 — Worked Solution

P1·Indices, Logarithms & Exponentials·6.0Official · 2020 · Q15

log-lawshidden-quadraticpositive-difference

Find the positive difference between the two real values of

x

for which

(lo g_{2} x)^{4} + 12 (lo g_{2} \frac{1}{x})^{2} - 2^{6} = 0.

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