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= log 9 + log 5
= log 3^2 + log 5
= 2.log 3 + log 5
= 2(0,4771)+0,6990
= 1,6232
2. 3. ³log 2 + 2. ³log 9 - ³log 24
= ³log (2 ^3) + 2 ³log(3^2) - ³log(8 X 3)
= ³log 8 + 4 -( ³log8 + ³log 3)
= ³log 8 + 4 - ³log 8 - ³log 3
= 4-1
= 3