5.23的a次方=1000,0.00523的b次方=1000,求1/a-1/6的值
问题描述:
5.23的a次方=1000,0.00523的b次方=1000,求1/a-1/6的值
答
∵5.23的a次方=1000
∴a=log(5.23)1000
同理,b=log(0.00523)1000
∴1/a=1/log(5.23)1000=log(1000)5.23
1/b=1/log(0.00523)1000=log(1000)0.00523
所以1/a-1/b=log(1000)5.23-log(1000)0.00523=log(1000)(5.23/0.00523)=log(1000)1000=1