Question

若ab＝1,则【a/（a+1）】+【b/（b+1）】的值为___.

Answer 1

方法正确【a/（a+1）】+【b/（b+1）】=【a（b+1）+b（a+1）】/（a+1）（b+1）=【1/（a+1）（b+1）】*【a（b+1）+b（a+1）】={1/【（b+1）-（a+1）】}*【1/（a+1）-1/（b+1）】*【a（b+1）+b（a+1）】={1/【（b+1）-...