2,Chung minh voi moi x nguyen duong thi phan so sau toi gian:

\(\frac{6+8x+15x^2}{13+21x+30x^2}\)

giup minh nhe minh dang can gap.

1) Phan tich da thuc sau thanh nhan tu: x²-x-2008.2009

2) Chung minh rang voi moi x,y,z ta luon co: x²+4y²+z²>=2x+12y+4z

3) Cho a-b=4. Tinh gia tri cua bieu thuc: a³-12ab-b³

          cac ban lam duoc cau nao thi giup mik nha. mik dang can gap lam

cho x>=y>=z>0.chứng minh \(\frac{x^2y}{z}+\frac{y^2z}{x}+\frac{z^2x}{y}>=x^2+y^2+z^2\)

minh dang can gap lam ai giup minh vs

bài 1: cho x,y thuộc R thoả mãn  x^3+y^3+3.(x^2+y^2)+4.(x+y)+4=0 với xy>0

Tìm Max M = \(\frac{1}{x}+\frac{1}{y}\)

cac ban oi giup minh. minh dang can gap.

Cho bieu thuc:

 \(P=\frac{x+2}{x+3}-\frac{5}{x^2+x+6}+\frac{1}{2-x}\)voi \(x\ne-3;x\ne2\)

a, Rut gon P

b, tim x de \(P=\frac{-3}{4}\)

c,tim x nguyen de P dat gia tri nguyen

(mk dang can gap ai giai dung dau tien mk tick cho)

Tìm a,b,c sao cho

a, \(\frac{1}{x\left(x+1\right).\left(x+2\right)}=\frac{a}{x}+\frac{b}{x+1}+\frac{c}{x+2}\)

cac ban oi giup minh di. minh dang can gap lam. lam on

BAI 1 TINH

x ^ 2 . x - 2x^3

6 x^2 y . 3 xy - 2y ^2 .x +y

4x^2 + 5x -1  . 2x^3 - 3x

- 8 x^3y + 2 y^4 . 3xy^3 - 2 x^4 + 7y ^4

CAC BAN OI GIUP MINH NHE MINH DANG CAN GAP

tim x

(x^2+3x-10).(x^2+3x+2)+36=0

minh dang can gap cac ban lam oi nhanh len nhe

TO HUA SE TICK

giup to voi

tim x

(x^2+3x-10).(x^2+3x+2)+36=0

minh dang can gap cac ban lam oi nhanh len nhe

TO HUA SE TICK

giup to voi