若(2a-b)零次方=1,则分式a²-3ab+2b²分之a²+2ab-b²
来源:学生作业帮助网 编辑:六六作业网 时间:2024/08/26 21:09:12
若(2a-b)零次方=1,则分式a²-3ab+2b²分之a²+2ab-b²若(2a-b)零次方=1,则分式a²-3ab+2b²分之a
若(2a-b)零次方=1,则分式a²-3ab+2b²分之a²+2ab-b²
若(2a-b)零次方=1,则分式a²-3ab+2b²分之a²+2ab-b²
若(2a-b)零次方=1,则分式a²-3ab+2b²分之a²+2ab-b²
(2a-b)零次方≠1 (本题改一下,否则不好做)
所以
2a=b
a²-3ab+2b²分之a²+2ab-b²
=(a²+2ab-b²)/(a²-3ab+2b²)
=(a²+4a²-4a²)/(a²-6a²+8a²)
=a²/3a²
=1/3