Các câu hỏi tương tự
tim cac da thuc dong dang 5/3x^2y, (xy^2), 2xy^2, 2x^2y, 1/4xy^2, x^2y, x^2y, -1/2x^2y, -2/5x^2y, -4xy^2
a) ( -3x^2y - 2xy^2 +6) + (-x2y + 5xy^2 -1) b) (1,6x^3 -3,8x^2y) + (-2,2x^2y - 1,6x^3 + 0,5xy^2) c) (6,7xy^2 - 2,7xy + 5y^2) - (1,3xy - 3,3xy^2 + 5y^2) d) ( 3x^2 - 2xy + y^2) + (x^2 -xy + 2y^2) - ( 4x^2 - y^2) e) ( x^2 + y^2 - 2xy) - ( x^2 + y^2 + 2xy) + ( 4xy -1)
Cho don thuc A=(-2xy)-4/5x^2y^3 a,Thu gon don thuc tren ,cho biet phan he so va phan bien ,tim bac cua don thuc b,Tinh gia trim cua don thuc tai x=1,y=-1
Cho don thuc A=(-2xy)-4/5x^2y^3 a,Thu gon don thuc tren ,cho biet phan he so va phan bien ,tim bac cua don thuc b,Tinh gia trim cua don thuc tai x=1,y=-1
Thu gon cac don thuc sau roi tim he so va bac cua no
a, (-2xy^3). (1/3xy)^2
b,18x^2y^2 . (-1/6x^3y)
c, (-2/3xy^2) . 6x^2y^2
A=1/3(xy^2)^2.(1/2x^2y)^2.4/5.x^3
B=-2x^4y.1/4x^2.y^2.(-2xy)^3
Thu gon da thuc tren
Xac dinh he so ,bac cua cac don thuc vua thu gon
Tinh A+B va A-B
a,Tim GTNN cua bieu thuc :
P= |x-2010|+|2011-x|
b,tim cac so nguyen to x,y thoa man :
x^2-2y^2=1
tim da thuc;A-(x^2y-2xy^2+xy+1)=x^2y+xy^2-xy-1 b,tinh A tai x=1,y=(-1)
bai 1: Cho cac don thuc A=-4/9x^3y va B= 3/8 x^5y^3. Tim cac cap gia tri (x;y)de A,B cung gia tri am
bai 2: viet don thuc B=64xy^12 duoi dang luy thua cua 1 don thuc voi so mu khac 1
bai 3: cho A=8x^5y^3; B=-3x^6y^3; C=-6x^7y^2. CM: Ax^2+Bx+C>0