Question

so sánh mà ko tính

a)A=2017.2017

B=2016.2018

b)C=123123.567

   D=567567.123

Answer 1

a) A= 2017.2017=2017.(2016+1)=2017.2016.2017.1

    B= 2016.2018=2016.(2017+1)=2016.2017.2016.1

Vì 2017.1 > 2016.1 => A>B

K mk nha bn!

Answer 2

Ta có : B = 2016.2018 = (2017 - 1)(2017 + 1) = 2017² - 1 < 2017²

Vậy B > A .