计算题 (log2\5+log4\0.2)(log5\2+log25\0.5)2是下标～

计算题 (log2\5+log4\0.2)(log5\2+log25\0.5)2是下标～
计算题 (log2\5+log4\0.2)(log5\2+log25\0.5)
2是下标～

计算题 (log2\5+log4\0.2)(log5\2+log25\0.5)2是下标～
由变换(log2\5+log4\0.2)=log(2\5)*(4\0.2)=log8
同理（log5\2+log25\0.5)=log125,因此log8+log125=log8*125=log1000=3