高一数学:利用对数的换底公式化简下列式子(过程麻烦写下):(log43+log83)(log32+log92)
2013-06-14
展开全部
(log43+log83)(log32+log92)
=(lg3/lg4+lg3/lg8)(lg2/lg3+lg2/lg9)
=(lg3/2lg2+lg3/3lg2)(lg2/lg3+lg2/2lg3)
=[(5/6)(lg3/lg2)][(3/2)(lg2/lg3)]
=5/4
=(lg3/lg4+lg3/lg8)(lg2/lg3+lg2/lg9)
=(lg3/2lg2+lg3/3lg2)(lg2/lg3+lg2/2lg3)
=[(5/6)(lg3/lg2)][(3/2)(lg2/lg3)]
=5/4
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询