B=|x+2015|+2016
Ta có |x+2015|>hoặc=0 với mọi x
=>B>hoặc=2016
Vậy min B=2016 khi x=2015
C=1982-|x-6|
Ta có -|x-6|<hoặc=0
=>C>hoặc=1982
Vậy max B=1982 khi x=6
Tim gia tri nho nhat cua y de bieu thuc B=100-|y+3| co gia tri lon nhat, tim gia tri lon nhat do
Tim gia tri nho nhat cua bieu thuc: P=|x|+7
(x€Z)
Tim gia tri lon nhat cua bieu thuc :Q=9-|x|
Tim gia tri nho nhat hoac gia tri lon nhat cua bieu thuc D = (x + 5)^2 + (2y - 6)^2 + 1
hai so nguyen duong x,y co tong la 51
a tim gia tri lon nhat cua x.y
b tim gia tri nho nhat cua tich x,y, biet rang x va y deu lon hon 1
tim gia tri lon nhat hjoac nho nhat cua/x-1/ +/x-2/=A
Tim gia tri cua x va y de bieu thuc C = -|x-2|-|y-3|-2009 co gia tri lon nhat ,tim gia tri lon nhat do
Tim gia tri cua x de bieu thuc A=|x-3|+(-100)co gia tri nho nhat ,tim gia tri nho nhat ay
tim gia tri lon nhat cua A=2018-/x-7/-/y+2/
tim gia tri nho nhat cua B /x-500/+/x-300/
tim n thuoc Z,biet: a,3.n+2 chia het cho n-1; b, n^2 +5 chia het cho n+1
a, tim gia tri nho nhat cua bieu thuc :\(A=\)\(|x+19|+|y-5|+1890\)
b,tim gia tri lon nhat cua bieu thuc:\(B=-|x-7|-|y+13|+1945\)
