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(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2.................999 x 2 x 2 x 2 ?

A.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 > 999 x 2 x 2 x 2 = 9990 > 7992

B.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 < 999 x 2 x 2 x 2 = 9990 < 7992

C.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 = 999 x 2 x 2 x 2 = 9990 = 7992

Đáp án A nhé

`648-x xx 34 =444`

`x xx 34=648-444`

`x xx 34=204`

`x=204:34`

`x=6`

$648-x\times 34=444$

$x\times 34=648-444$

$x\times 34=204$

$x=204:34$

$x=6$

`648 - 34*x = 444`

`=> 34x = 648 - 444`

`=> 34x = 204`

`=> x = 204 \div 34`

`=> x = 6`

Vậy, `x = 6.`

Lời giải:

$648-34x=444$

$34x=648-444=204$
$x=204:34=6$

648 - 34 x X = 444

34 x X = 648 - 444

34 x X = 204

x = 204 : 34

x = 6

648-34xX=444

=>34xX=648-444

=>34xX=204

=>X=204:34

=>X=6

|x-4|=444

TH1=> x-4=444

=>x=444+4

x=448

TH2: x-4=-444

=>x= -444+4

=>x=-440

Vậy x=-440 và x=448

​| x - 4 | = 444

=> x - 4 = 444 hoặc x - 4 = -444

​+) Nếu x - 4 = 444

x = 444 + 4

x = 448

+) Nếu x - 4 = -444

x = ( -444 ) + 4

​x = -440

=> x = { -440 ; 448 }

-42528

#giải:

125 . 456 + 456 . 31 - 256 . 444

= 456 . ( 125 + 31 ) - 256 . 444

= 456 . 256 - 256 . 444

= 256 . ( 456 - 444 )

= 256 . 12

= 3072

         #By_Ami 

b, 333⁴⁴⁴ = (3.111)^4.111 = (81.111⁴)¹¹¹

444³³³ = (4.111)^3.111 = (64.111³)¹¹¹

Vì (81.111⁴)¹¹¹ > (64.111³)¹¹¹ nên 333⁴⁴⁴ > 444³³³

\(333^{444}=111^{444}.3^{444}=111^{444}.81^{111}>111^{333}.64^{111}=111^{333}.4^{333}=444^{333}\)

648-34*x=444

34*x=648-444

34*x=204

x= 204:34

x=6

nhớ k cho mik nha ^_^

648-34*x=444

34*x=648-444

34*x=204

x=204:34

x=6

Vậy x=6