(1/a+1/b)²÷(1/a²-1/b²)

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/09 03:25:30
(1/a+1/b)²÷(1/a²-1/b²)

(1/a+1/b)²÷(1/a²-1/b²)
(1/a+1/b)²÷(1/a²-1/b²)

(1/a+1/b)²÷(1/a²-1/b²)
=(1/a+1/b)²÷[(1/a+1/b)(1/a-1/b)]
=(1/a+1/b)/(1/a-1/b)
=(b+a)/(b-a)