Các câu hỏi tương tự
tim x,y biết
3*x^2*y+6*x^2*y^2+2*y=8
tim x,y thuoc Z
x.( y -2 ) + 2.y = 8
x -1 /y + 5 = 1/5 va x+ y = 4
Tim x,y thuoc N biet :25 - y2 = 8(x-2015)2
cho 2 số thực duong x y thỏa mãn 4/x^2 +5/y^2>=9 . tim gia tri nho nhat cua bieu thuc Q=2x^2+6/x^2+3y^2+8/y^2
Tim GTNN
B=x^2+y^2+2x-y+1
C=2x^2+y^2+2xy+2x-2y+8
cho cac so thu cx,y thoa man 4/x^2+5/y^2 >=9 tim GTNN cua bt
Q=2x^2+6/x^2+3y^2+8/y^2
X^2+2y^2+z^2-2(xy+2y+2z+8)=0 Tim x y z
bai 1:tim GTNN cua bieu thucAx2+3x+7B(x-2)(x-5)(x2-7x-10)bai 2:tim GTLN cua bieu thucA11-10x-x2B[x-4](2-[x-4])bai 3:tim x,y sao choA2x2+9y2-6xy-6x-12y+2016 co GTNNB-x2+2xy-4y2+2x+10y-8 co GTLNbai 4 :a)cho x+y3;x2+y25.tinh x3+y3b)cho x-y5;x2+y215.tinh x3-y3
Đọc tiếp
bai 1:tim GTNN cua bieu thuc
A=x2+3x+7
B=(x-2)(x-5)(x2-7x-10)
bai 2:tim GTLN cua bieu thuc
A=11-10x-x2
B=[x-4](2-[x-4])
bai 3:tim x,y sao cho
A=2x2+9y2-6xy-6x-12y+2016 co GTNN
B=-x2+2xy-4y2+2x+10y-8 co GTLN
bai 4 :
a)cho x+y=3;x2+y2=5.tinh x3+y3
b)cho x-y=5;x2+y2=15.tinh x3-y3
Tim cap (x,y) thoa man ( x-y+2) . ( x-2) + ( x-y+2) . ( 2-x) =5