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b) = 2
c) = log₃9 = 2
d) = (nie jest liczbą całkowitą)
odp d)
32-8x ≥ 0 i 3-x ≥ 0
8x ≤ 32 i x ≤ 3
x ≤ 4
odp. c) x ∈ ( - ∞ ; 3 >