化简(log以4为底3的对数+log以8为底3的对数)乘(log以3为底2的对数+log以9为底2的对数)
问题描述:
化简(log以4为底3的对数+log以8为底3的对数)乘(log以3为底2的对数+log以9为底2的对数)
答
=(lg3/lg4+;g3/lg8)(lg2/lg3+lg2/lg9)
=(lg3/2lg2+;g3/3lg2)(lg2/lg3+lg2/2lg3)
=(1/2+1/3)*lg3/lg2*(1+1/2)*(lg2/lg3)
=5/4