\(2929.57-5757.29\)

\(=29.101.57-57.101.29\)

\(=0\)

My best friend is Giang. She is a bit short, with short hair and a quick gait. She is very good at English. She is a curious and extremely active person. She is always cheerful. Her favorite subject is English. Her hobbies are watching TV and listening to music. Everyday, I and she go to school together. I hope that friendship between us will become more familiar.

  My best friend is Giang. She is a bit short, with short hair and a quick gait. She is very good at English. She is a curious and extremely active person. She is always cheerful. Her favorite subject is English. Her hobbies are watching TV and listening to music. Everyday, I and she go to school together. I hope that friendship between us will become more familiar

gửi lắm thế

(101.98.75-101.75.98).(19.21.23.25)

=0.(19.21.23.25)

=o

bn có thể viết cả mũ ra hay ko

\(2a=2.\left(2+2^2+...+2^{100}\right)\)

\(2a=2^2+2^3+...+2^{101}\)

\(2a-a=\left(2^2+2^3+...+2^{101}\right)-\left(2^1+2^2+...+2^{100}\right)\)

\(2a-a=2^{101}-2\)

mà \(2a-a=2^x-2=>x=101\)

hi dương tao cũng đặt câu hỏi này đây

ai làm hộ mk ko đang cần gấp mà

\(\frac{\left(3^{19}.7+3^{19}.20\right)}{3^{10}}=\frac{3^{19}.3^3}{3^{10}}=\frac{3^{22}}{3^{10}}=3^{12}\)

P/S: nhấn vào câu hỏi tương tự cx đc đó bn 

\(\left(3^{19}.7+3^{19}.20\right).3^{10}\)

\(=\left[3^{19}.\left(7+20\right)\right].3^{10}\)

\(=\left[3^{19}.27\right].3^{10}\)

\(=\left[3^{19}.3^3\right].3^{10}\)

\(=3^{22}.3^{10}\)

\(=3^{32}\)

t i c k cho mk nha

n+5 chia hết cho n

và n chia hết cho n

suy ra n+5-n chia hết cho n

suy ra 5 chia hết cho n

n thuộc 5;-1;-5;1

Ta có: \(\frac{n+5}{n}=\frac{n}{n}+\frac{5}{n}=1+\frac{5}{n}\)

Suy ra, để n + 5 chia hết cho n thì 5 phải chia hết cho n hay n thuộc Ư(5)

Mà Ư(5) = { -5; -1; 1; 5 }

Vậy: \(n\in\left\{-5;-1;1;5\right\}\)

bn có thể lên mạng dịch nhé

\(\frac{3^{19}.27}{3^{10}}=\frac{3^{19}.3^3}{3^{10}}=\frac{3^{22}}{3^{10}}=3^{12}\)

(3¹⁹.27):3¹⁰

= (3¹⁹.3³):3¹⁰

=3²²:3¹⁰

=3¹²

k mik nha