152x146=22192

182x155x140=3949400

156x178=27768

18x49x16=14112

84x19x17=27132

150:5=30

150:3=50

152:2=76

150x810=121500

152 x 146 = 22192

182 x 155 x 140 = 3949400

156 x 178 = 27768

18 x 49 x 16 = 14112

84 x 19 x 17 = 27132

150 : 5 = 30 

150 :3  = 50

152 : 2 = 76

150 x 810 = 121500 

`152xx146=22192`

`182xx155xx140=28210xx140=3949400`

`156xx178=27768`

`18xx49xx16=882xx16=14112`

`84xx19xx17=1596xx17=27132`

`150:5=30`

`150:3=50`

`152:2=76`

`150xx810=121500`

ĐK : \(x\ge3;y\ge1;z\ge665\)

\(\dfrac{16}{\sqrt{x-3}}+\dfrac{4}{\sqrt{y-1}}+\dfrac{1225}{\sqrt{z-665}}=82-\sqrt{x-3}-\sqrt{y-1}-\sqrt{z-665}\)

\(\Leftrightarrow\left(\dfrac{16}{\sqrt{x-3}}+\sqrt{x-3}\right)+\left(\dfrac{4}{\sqrt{y-1}}+\sqrt{y-1}\right)+\left(\dfrac{1225}{\sqrt{z-665}}+\sqrt{z-665}\right)=82\)

Theo BĐT Cô Si cho các số dương ta có :

\(\left\{{}\begin{matrix}\dfrac{16}{\sqrt{x-3}}+\sqrt{x-3}\ge2\sqrt{\dfrac{16\sqrt{x-3}}{\sqrt{x-3}}}=2\sqrt{16}=8\\\dfrac{4}{\sqrt{y-1}}+\sqrt{y-1}\ge2\sqrt{\dfrac{4\sqrt{y-1}}{\sqrt{y-1}}}=2\sqrt{4}=4\\\dfrac{1225}{\sqrt{z-665}}+\sqrt{z-665}\ge2\sqrt{\dfrac{1225\sqrt{z-665}}{\sqrt{z-665}}}=2\sqrt{1225}=70\end{matrix}\right.\)

\(\Rightarrow\left(\dfrac{16}{\sqrt{x-3}}+\sqrt{x-3}\right)+\left(\dfrac{4}{\sqrt{y-1}}+\sqrt{y-1}\right)+\left(\dfrac{1225}{\sqrt{z-665}}+\sqrt{z-665}\right)\ge82\)

Dấu \("="\) hiển nhiên xảy ra khi :

\(\left\{{}\begin{matrix}\dfrac{16}{\sqrt{x-3}}=\sqrt{x-3}\\\dfrac{4}{\sqrt{y-1}}=\sqrt{y-1}\\\dfrac{1225}{\sqrt{z-665}}=\sqrt{z-665}\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x-3=16\\y-1=4\\z-665=1225\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=19\\y=5\\z=1890\end{matrix}\right.\)

=666

ý đồ cao

1 + 665 = 666

= 666

Dễ mà!!!!!

665+1=666

665 + 1 = 666

Chúc bn học giỏi

665+1=666

666 đấy

665+1 =666

bằng 666 bạn nhé

 chuc ban hoc gioi

665+5754+45=6464

6464 nhé bạn có câu nào bạn bấm phép đó lên google nha !

Ket qua cua phep tinh tren la:

665+5754+45=6464

Dap so:6464