Question

cho A = 20000015²
cho B = 20000014 . 20000016
So sánh A và B

Answer 1

A = 20000015² = (20000014 + 1).20000015 = 20000014.20000015 + 20000015

B = 20000014.20000016 = 20000014.(20000015 + 1) = 20000014.20000015 + 20000014

Vì 20000014.20000015 + 20000015 > 20000014.20000015 + 2000014

=> A > B

Answer 2

Ta có: B=20000014.20000016=(20000015-1).(20000015+1)=20000015²-1

Vì 20000015²-1<20000015²

=>B<A

Vậy B<A