tất nhiên là hơn thế nữa hihi=))

e nha

voi dừa

1. S
2, Đ
3. Đ

9389

hello

Tạc lòng

291 : a và 10<a<100
=>a\(\in\) Ư(291)
Ư(291)={1; 3; 97; 291}
mà 10<a<100
=> a=97

1;2;4;6;10;14;16;...

a) \(\frac{2\cdot6^9-2^5\cdot18^4}{2^2\cdot6^5}\)
\(=\frac{2\cdot\left(2\cdot3\right)^9-2^5\cdot\left(2\cdot3^2\right)}{2^2\cdot\left(2\cdot3\right)^5}\)
\(=\frac{2\cdot2^9\cdot3^9-2^5\cdot2^4\cdot3^8}{2^2\cdot2^5\cdot3^5}\)
\(=\frac{2^{10}\cdot3^9-2^9\cdot3^8}{2^7\cdot3^5}\)
\(=\frac{2^9\cdot3^8\left(2\cdot3-1\cdot1\right)}{2^7\cdot3^5}\)
\(=2^2\cdot3^3\left(2\cdot3-1\cdot1\right)\)
\(=4\cdot27\cdot5\)
\(=540\)