Question

So sánh A=2015.2017 và B=2016²

Answer 1

A=2015×2017

A=2015×(2016+1)

A=2015×2016+2015×1

B=2016²=2016×2016

B=2016×(2015+1)

B=2016×2015+2016×1

ta thấy : 2015×2016+2015×1<2016×2015+2016×1

nên : A<B hay B>A

chúc các bn hok tốt!

Answer 2

A = 2015.2017 

= 2015(2016 + 1)

= 2015.2016 + 2015

B = 2016²

= 2016.(2015 + 1)

= 2016.2015 + 2016

Vì 2015 < 2016 => A < B