(x+20)^100 + /y+4/=0
tim x,y
/ / la gia tri tuyet doi
cho x ; y la cac so nguyen to sao cho gia tri tuyet doi cua x cong gia tri tuyet doi cua y bang 5 so cap so nguyen (x;y) thoa man la
tim gia tri cua x biet !4-!x-3!!=3
luu y:! la gia tri tuyet doi
gia tri tuyet doi x-42017+gia tri tuyet doi y=0
/X-3/ - 7 = 9 Luu y : /x/ la gia tri tuyet doi
/x-3/-7=9
=> /x-3/=16
=> TH1 x-3=16 => x=19
th2 x-3=-16 => x= -13
/x-3/ = 16
\(\Leftrightarrow\) x -3 = 16 => x = 19
x - 3 = - 16 => x = - 13
gia tri tuyet doi x /gia tri tuyet doi y=2/3 biet x^2-y^2=5
cho gia tri tuyet doi cua |x| =7,|y|=20.tính x-y
gia tri tuyet doi cua x-2 +2 . gia tri tuyet doi ua x-y =0
|x-2|+2|x-y|=0
Vì |x-2| \(\ge\) 0 với mọi x
2|x-y| \(\ge\) 0 với mọi x;y
=>|x-2|+2|x-y| \(\ge\) 0 với mọi x;y
Dấu "=" xảy ra
<=>|x-2|=2|x-y|=0
+)|x-2|=0<=>x=2
+)2|x-y|=0<=>x-y=0<=>x=y<=>y=2
Vậy.....................
cho x,y la 2 so nguyen cung dau va gia tri tuyet doi cua x va y = 10. tinh x,y