lg(1/2)-lg(5/8)+lg12.5-log8^9×log3^4要过程
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![lg(1/2)-lg(5/8)+lg12.5-log8^9×log3^4要过程](/uploads/image/z/11620383-15-3.jpg?t=lg%281%2F2%29-lg%285%2F8%29%2Blg12.5-log8%EF%BC%BE9%C3%97log3%EF%BC%BE4%E8%A6%81%E8%BF%87%E7%A8%8B)
lg(1/2)-lg(5/8)+lg12.5-log8^9×log3^4要过程
lg(1/2)-lg(5/8)+lg12.5-log8^9×log3^4要过程
lg(1/2)-lg(5/8)+lg12.5-log8^9×log3^4要过程
lg(1/2)-lg(5/8)+lg12.5-log8^9×log3^4
=lg(1/2÷5/8×12.5)-lg9/lg8×lg4/lg3
=lg10-2lg3/3lg2 ×2lg2/lg3
=1-2/3×2
=-1/3