Các câu hỏi tương tự
Chung minh bieu thuc sau luon co gia tri duong voi moi gia tri cua x
B=x4-2x3+2x2-4x2-4x+5
chung minh cac hang dang thuc sau luon co gia tri duong voi moi gia tri cua bien
4)D=x^2 -2x+y^2+4y+6
5)P=(15x - 1)^2+3(7x+3)(x+1) -(x^2 -73)
Tim gia tri nho nhat A=x2-2x
Tim gia tri lon nhat B=-x2+4x-5
Chung minh rang: x4+6x3+11x2+6x chia het cho 24 voi moi x thuoc N
chung minh rang bieu thuc 4x(x+y)(x+y+z)(x+y) y^2x^2 luon luon khong am voi moi gia tri cua x,y va z
cmr voi moi gia tri cua x ta luon co
2x3+x2<=2x4+1
chung to rang phuong trinh
6x=3 ( 2x + 2) - 6
nghiem dung voi moi gia tri cua x
giai chi tiet giup minh may bai nay nha
1 gia tri x>0 thoa man
(2x-3)2=(x+5)2
2 gia tri lon nhat cua -3x2-6x-4
3 tim gia tri cua x+y biet
x-y=2 ; x*y=99 va y <0
4 nghiem cua phuong trinh
(2x-3)2-4x2-297=0
tim gia tri lon nhat ( hoac nho nhat ) cua cac bieu thuc sau:
a) A = x^2 - 6x + 11
b) B = 2x^2 + 10x - 1
c) C = 5x - x^2
giai jup mik voi
cho da thuc f(x)= -2+x^4+2x^2-3x^3+4x^4-5x^4+3x^3+3 chung minh rang da thuc f(x) ko co nghiem tai moi gia tri cua x