5.12. Rozwiąż równania:
5.12.1. log20c2 — 2) — log2(6 — x) + \ = 0,
5.12.2. log3(xr2 — 6) = log3(x — 2) +
5.12.3. log2(9x2 - 20) - log26 = 2 + log2x,
5.12.4. log(3x - 4)2 + log(2x - 4)2 = 2,
5.12.5. log(jc2 - 2x + 1) + 1 = 2\og(\ - x) + -V V),
5.12.6. log(4x2 - 4x + 1) + 2 = 2\og(\ - 2x) + \og^x2 +
5.12.7. log (a*3 + 8) - log(x + 2) = \,
5.12.8. (log2x)2 + 3 = 21og2x2,
5.12.9. 2 (log 2 x)2 - Mog2- - U =0,