Cho don thuc K=1/5x^3y(-x^4yz^3)^2
AIgiup mk voi
a) cho vi du ve 1 don thuc ,1 da thuc nhung k phai la don thuc , 2 don thuc dong dang voi nhau .da thuc 1 bien
b) Hay viet 1 don thuc dong dang voi don thuc xy\(^3\) sao cho tai x=-1 y=2 gia tri cua don thuc do la so nguyen duong nho hon 10
GIUP MINH NHA
ko bt minh cung dang giai bai tuong tu do ne
a) Cho vidu ve 1 don thuc ,moi da thuc nhung k phai la don thuc 2 don thuc dong dang voi nhau,da thuc 1 bien
b) Hay viet 1 don thuc dong dang voi don thuc xy\(^3\) sao cho tai x=-1 y=2 gia tri cua don thuc do la so nguyen duong nho hon 10
CAC BAN GIUP MINH NHA MINH GAP LAM
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
a)Cho vi du ve 1 don thuc ,1 da thuc nhung khong phai la don thuc ,2 don thuc dong dang voi nhau ,da thuc 1 bien
b)Hay viet 1 don thuc dong dang voi don thuc don thuc xy\(^3\) sao cho tai x=-1 y=2 gia tri cua don thuc do la so nguyen duong nho hon 10
a) 5 ; x+y ;2xy đồng dạng với 4xy ;a (x) = 25x + 2x2
b) -2xy
thu gon don thuc tim bac he so cua da thuc A=x^3 *(-5/4x^2y)*(2/5x^3y^4)
thu gon don thuc
(-x^3*z*y)*(2/3*y*x^2)^2
giup mk voi
\(\left(-x^3.z.y\right).\left(\dfrac{2}{3}.y.x^2\right)^2\)
\(=-x^3.z.y.\dfrac{4}{9}.y^2.x^4\)
\(=-\dfrac{4}{9}x^7.y^3.z\)
`(-x^3zy)(2/3yx^2)^2`
`=-4/9x^3zy.y^2x^4`
`=-4/9x^{3+4}.y^{1+2}z`
`=-4/9x^7y^3z`
\(\left(-x^3zy\right)\left(\dfrac{2}{3}yx^2\right)^2\)
\(\Leftrightarrow\left(-x^3yz\right)\left(\dfrac{2}{3}x^2y\right)\left(\dfrac{2}{3}x^2y\right)\)
\(\Leftrightarrow-\left[x^7y^3z\left(\dfrac{2}{3}\right)^2\right]\)
\(\Leftrightarrow-\dfrac{4}{9}x^7y^3z\)
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
a, P=-3(x^3.x)(y^2.y^3)
=-3x^4y^5
b, Thay x=-1 , y=2 vào đơn thức P . Ta có :
P=-3.(-1)^4.2^5
P=3.1.32
P=96
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 gọn đa thức
A=1/5 x^3y . (-5x^4yz^3)^2
A=\(\frac{1}{5}x^3y.\left(-5x^4yz^3\right)^2\)
A=\(\left(\frac{1}{5}.-5\right).\left(x^3.x^8\right).\left(y.y^2\right).\left(z^6\right)\)
A=
Mình trả lời nốt nha!
A=\(-1.x^{11}.y^3.z^6\)