|x-1|+|x-3| dat gia tri nho nhat
vi|x-1| lon hon hoac bang 0
|x-3| lon hon hoac bang 0
nen |x-1|+|x-3| lon hon hoac bang 0
dau = xay ra khi|x-1|=0 va |x-3|=0
nen x-1=0vax-3=0
nenx=1 va x=3
vay x=1hoac x=3
Tim x thuoc Z de |x-2|+|x-4| dat gia tri nho nhat . Ban nao giai thich de hieu chut nha !
Cho M :x-2/x+3
a, Tim x € Z de M co gia tri nguyen
b, Tim x € Z de M la gia tri nho nhat . Tim gia tri nho nhat do
Tìm cacs gia tri cua x,y,z de A dat gia tri nho nhat
A=/7x-5y/+/3z-3x/+/xy+yz+xz-2000/
A = x^2 - 8x + 2015 tim x de A dat gia tri nho nhat
tim cac so nguyen x de bieu thuc
A= |x-1|+|x-2|dat gia tri nho nhat
Cho ham so f(x) = | x - 2014 | - | x + 2014 |
a, Chung minh rang f(x) = -f(-x)
b, Tim x de f(x) dat gia tri nho nhat, gia tri lon nhat
GIUP MIK VS
Tim x ; y de :
A = lxl + l 8-xl dat gia tri nho nhat
cho bieu thuc A = 2006 -x / 6-x tim gia tri nguyen cua x de A dat gia tri lon nhat. Tim gia tri lon nhat do
Tim x thuoc Z de bieu thuc sau day dat gia tri lon nhat :
B= 2015x+1/2016x-2016 (x thuoc Z; x khac 1)
