His beloved school high school named tri secondary basis. My school is divided into two infant schools, house 1 to school, house 2 to where the teachers stay. Behind the school is one very beautiful lawns with flowers, the playground was built of concrete. On the pitch there are many trees and flower tubs. in the garage is divided into two parts for the first class to place the car, on the beautifully painted walls. in the classroom was beautifully decorated and at each door cs 1 lottery is very fresh little flower pots watered by you. Tables and chairs are told very neat and clean. MY VERY LOVE YOUR SCHOOL

k nha , chúc bạn học tốt !

bằng 333200

đoán xy=1

Theo đề bài ra ta có:                                            

 * *** x 9 = 21 18*

=>21 18* : 9 = ****

Ta thấy: 2 + 1 + 1 + 8 = 12. Vậy 21 18* chia hết cho 9 thì * đáp ứng điều kiện có 1 chữ số và ( 12 + * ) chia hết cho 9.

Số chia hết cho 9 thảo mãn điều kiện trên là 18. Vậy 12 + * = 18, * = 18 - 12 = 6

Ta có: 21 186 : 9 = 2 354 nên 2 354 * 9 = 21 186 

2354

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      9

21186

nha bạn

     A= 100² > 

     B= 96 x 104chuc bn hok tốt

\(A=100^2=100\left(104-4\right)=100.104-400\)

\(B=96.104=\left(100-4\right).104=100.104-416\)

Ta có: A > B

\(\left(x-1\right)\cdot\left(x-1\right)^2.\left(x-1\right)^3=1024\)

\(\Rightarrow\left(x-1\right)^1.\left(x-1\right)^2.\left(x-1\right)^3=1024\)

\(\Rightarrow\left(x-1\right)^{1+2+3}=1024\)

\(\Rightarrow\left(x-1\right)^6=1024\)

\(\Rightarrow x=\varnothing\)

Mình xin phép sửa đề nhé!

Sửa đề: \(2^1+2^2+...+2^{201}=2^x-2\) (1)

Đặt  \(A=2^1+2^2+...+2^{201}\Rightarrow2A=2^2+2^3+...+2^{202}\) 

Lại có: \(2A-A=A=2^{202}-2\) (2)

Từ (1) và (2) ta có: \(2^x-2=2^{202}-2\Rightarrow x=202\)