1- 1 phan 2 - 1 phan 2 ^2 - 1phan 2^3 - 1phan 2^4-....- 1phan 2^10 .> 1phan 2^11
9 * 3 mu 3 * 1 phan 81 * 3 mu 2
4.2mu5 / {2 mu 3. 1 phan 16 }
a} 2xy2 . ( -3 )x3 y
b) (- 3 )2 . 2ab
a) 6a2b.(-1phan 3 bc3)
b) [- 2 phan 3 x 2 y}. (6xyz2)
a) 9 * 33 * 1/81 * 32 = ?
cac ban giai ho minh nhe
b) 4 * 25 / { 23 * 1 phan 16)
bai 1: 2-3x=-5x+4
{x-1}mu 4={x-1}mu 40
3x-[2x-{5x+1}]=4
Bai 2:Ban Minh di xe dap tu nha den truong voi van toc 12km/h thi het nua gio. Neu ban di voi van toc 10km/h thi phai mat them bao nhieu thoi gian.
Bai 3: Chia so 1000 thanh 3 phan
Ti so giua phan 1 va phan 2 la 2; phan 2 va phan 3 ti le nghich voi 5 va 6.
cau1:1 pha n5.(-3 phan 5 - 10)+ 5x =x -2 phan 3
cau2:-3 phan 2(5 - 1 phan 6) +4 (x-1 phan 2)=1
B = 1 PHAN 3 a3 - 3 b2 , a= - 2,b = - 1 phan 3
tim cac so tu nhien a nho nhat sao cho
a>(12+1 phan 12++22+1 phan 22 +32+1 phan 32 +...+20142+1 phan 20142