8/4/2021 数学狗

苏苏酥Susu

1. if n<m<1, which one must be less than m^2 - N^2?
a)m-n
b)m+n
c) 忘了
d) (m+n)^2
e)(m-n)^2

2.The lengths of an isosceles triangle's 3 sides are t-6,2t-20, and t-4. which of the following is possible for the triangle's perimeter?
给了 I）26，II）34，III）40， 选 I&II only

长丝弓

感谢分享！   楼主还记得阅读、逻辑的关键词吗？谢啦