1, Không tính hãy so sánh : A=12 345 674 . 12 345 676 B = 12 345 675 . 12345675 03/07/2021 Bởi Hadley 1, Không tính hãy so sánh : A=12 345 674 . 12 345 676 B = 12 345 675 . 12345675
`A` `=` `12 345 674` . `12 345 676` `B` `=` `12 345 675` . `12 345 675` ____________ `A` `=` $12345674.12345676$ $=(12345675-1)(12345675+1)$ $=12345675^2-1$ `B` `=` $12345675.12345675=12345675^2$ $\text{Vì $12345675^2-1<12345675^2$ nên $12345674.12345676<12345675.12345675$}$ $\text{Vậy $12345674.12345676<12345675.12345675$}$ Bình luận
A=12 345 674 . 12 345 676
=152415691205624
B = 12 345 675 . 12345675
=152415691205625
`A` `=` `12 345 674` . `12 345 676`
`B` `=` `12 345 675` . `12 345 675`
____________
`A` `=` $12345674.12345676$
$=(12345675-1)(12345675+1)$
$=12345675^2-1$
`B` `=` $12345675.12345675=12345675^2$
$\text{Vì $12345675^2-1<12345675^2$ nên $12345674.12345676<12345675.12345675$}$
$\text{Vậy $12345674.12345676<12345675.12345675$}$