Proszę o pomoc w rozwiązaniu 3 zadań, daję naj:
1. Oblicz:
2√8 - 3√18
-------------- =
√50
2. Oblicz:
9
-------------- - 2 √7 =
√7 - 2
3. Oblicz:
log ₃ 45 - log ₃ 15 =
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