= -125[8(x+y)]=-125[8(-43-17)]=-125[8(-60)]=-125*-480=60000
= -125[8(x+y)]=-125[8(-43-17)]=-125[8(-60)]=-125*-480=60000
tinh gia tri bieu thuc
x^2+x-8voi x =-2
-5x^3.|x-1|+15 voi x=-2
-(x-1).(x+2)voi |x|=3
(4x-5).(x-7)voi(x-2).(x+3)=0
tinhgia tri bieu thuc
ax+bx voi a+b=-125, x=-8
ax-ay+bx-by voi a+b =15 , x-y=-4
cho x+y=5 tim gia tri nho nhat cua bieu thuc A=|x+1|+|y-2|
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
Voi gia tri nao cua x va y thi bieu thuc
C = | x - 100 | + | y + 200 | - 1 co GTNN ; tim GTNN do
Gia tri cua bieu thuc : A = x + 2y voi x = 7 ; y = - 3 la : A = ...
a, tim gia tri nho nhat cua bieu thuc :\(A=\)\(|x+19|+|y-5|+1890\)
b,tim gia tri lon nhat cua bieu thuc:\(B=-|x-7|-|y+13|+1945\)
tim gia tri bieu thuc x2 + y biet x = 2, y=4
tim gia tri nho nhat cua bieu thuc A=/x+y/+/x+3/+2014