Question

không thực hiện phép tính hãy so sánh 

A= 2017^2

B = 2016× 2018

Answer 1

B>A tk nha

Answer 2

Ta có :

A=2017.2017=(2016+1)2017

A=2017.2016+2017

Ta lại có :

B=2016.2018=2016(2017+1)

B=2016.2017+2016

Mà 2017>2016

\(\Rightarrow\)2017.2016+2017>2017.2016+2016

\(\Rightarrow\)A>B

Answer 3

B = 2016 x 2018

   = (2017-1)(2017+1)

   = 2017x2017 + 2017 - 2017 - 1

   = 2017x2017 -1

Vậy A > B

Answer 4

Ta có :

A=2017.2017=(2016+1)2017

A=2017.2016+2017

Ta lại có :

B=2016.2018=2016(2017+1)

B=2016.2017+2016

Mà 2017>2016

⇒2017.2016+2017>2017.2016+2016

⇒A>B