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8.
log 9 log 16 log 9 log 4^2 log 9 2log 4
--------- + --------- = ---------- + ---------- = ----------- + ------------- = 1/2 + 2 = 5/2
log 81 log 4 log 9^2 log 4 2log 9 log 4
odp. A
7. 1 log6 5
a = log3 6 * log6 5 = --------- * log6 5 = ------------ = log3 5
log6 3 log6 3
odp. A
6.
1 1
--------- + --------- = logπ 2 + logπ 5 = logπ (2 * 5) = logπ 10
log2 π log5 π
odp. A i C