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2. Log1/4 8 = x ⇔ = 8 ⇔ = ⇔ 2x = -3 ⇔ x=-1,5
3. Log2 50 = Log2 (5*5*2) = Log2 5 + Log2 5 + Log2 2 = 2,322 + 2,322 + 1 = 5,644
4. c) : = = = 2
d) = = = 15