giup to 3 bai nay 

1. gia tri x lon nhat thoa man : x²(5x-20)=15x

2 gia tri x >0 de -3x⁴+12x²+1 dat gia tri lon nhat

3. tap hop cac gia tri cua x thoa man : x⁴+x³+2x-4=0

Tim gia tri nho nhat cua cac bieu thuc sau

a) A=|5x+2|+2015

b) B=2016-|4-3x|

c) C=|x-4|+|x-3|

giup minh giai cac gia tri nay voi...dung minh se tich

HỨA SẼ TÍCH...

giup to 2 bai nay

1. gia tri x lon nhat thoa man x²(5x-2)+6=15x

2. gia tri x>0 de -3x⁴+12x²+1 dat gia tri lon nhat 

giup to 2 bai nay

1. gia tri x lon nhat thoa man x²(5x-2)+6=15x

2. gia tri x>0 de -3x⁴+12x²+1 dat gia tri lon nhat 

giup to 2 bai nay

1. gia tri x lon nhat thoa man x²(5x-2)+6=15x

2. gia tri x>0 de -3x⁴+12x²+1 dat gia tri lon nhat 

CMR :

1/1.2 + 1/3.4 + 1/5.6 +.........+ 1/49.50 = 1/26 + 1/27 +.......+ 1/49 + 1/50.

Tim cac gia tri cua x de cac bieu thuc sau day nhan gia tri am :

a) x² + 5x = A.

b) 3.(2x + 3) . (3x - 5).

Ai biet thi chi giup minh hai bai toan tren nhe ! Xin cam on moi nguoi. (Cang nhan cang tot,hihi)

bai 1: Cho cac don thuc A=-4/9x^3y va B= 3/8 x^5y^3. Tim cac cap gia tri (x;y)de A,B cung gia tri am

bai 2: viet don thuc B=64xy^12 duoi dang luy thua cua 1 don thuc voi so mu khac 1

bai 3: cho A=8x^5y^3; B=-3x^6y^3; C=-6x^7y^2. CM: Ax^2+Bx+C>0

bai 1:tim so nguyen x sao cho gia cua cac phan so la so nguyen

a)x+3/x-2

b)x²+3x-2/x+2

chu y:dau / la dau chia trong phan so

bai 2:cho A=2n+1/n-2 voi n la so nguyen

a)tim n de a la phan so

b)tim n de A nguyen

c)tinh gia tri cua A biet:n=2;1;-2;-1

giup minh voi minh dang can.Ai dung minh tick cho