高中对数计算

利用换底公式：logN=(logN)/(loga)这里：logN表示以a为底,N的对数。（log5+log125)(log2)/(log5)=[log5+(log5^3)/(log2^2)][(log2)]/[(log5)/(log√3)]=[log5+(3/2)(log5][(log2)]/[(log5)]*[(1/2)(log3)]=[(5/2)log5][(log2)]/[(log5)]*(1/2)=(5/4)(log5)(log2)/(log5)=(5/4)(log5)(log2)=(5/4)log5)(log2)/(log5)=5 /4