2log5(下标)25-3log2(下标)32怎么算?
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2log5(下标)25-3log2(下标)32怎么算?
2log5(下标)25-3log2(下标)32怎么算?
2log5(下标)25-3log2(下标)32怎么算?
2log5(25)-3log2(32)
=2×[2log5(5)]-3[5log2(2)]
=2×2-3×5
=4-15
=-11
2log5,25-3log2,32=2×5-3×5=-5