早教吧作业答案频道 -->数学-->
1/A-1/B=3,求2A+3AB-2B/A-AB-B
题目详情
1/A-1/B=3,求2A+3AB-2B/A-AB-B
▼优质解答
答案和解析
由1/A-1/B=3,有
B-A/AB=3
B-A=3AB
于是,
2A+3AB-2B/A-AB-B
=-6AB+3AB/-3AB-AB
=-3AB/-4AB
=3/4
B-A/AB=3
B-A=3AB
于是,
2A+3AB-2B/A-AB-B
=-6AB+3AB/-3AB-AB
=-3AB/-4AB
=3/4
看了1/A-1/B=3,求2A+3...的网友还看了以下：