cho da thuc f(x)=2x-3 . Tinh f(m)-f(m+2)
tim da thuc f(x) biet rang voi moi so m thi f(m) -f(m+2)=10
Bai 4: Xac dinh he so m de cac da thuc sau nhan 1 lam nghiem
a,mx\(^2\)+2x+8 b, 7x\(^2\)+mx-1 c, x\(^5\)-3x\(^2\)+m
Bai5: Cho da thuc f(x)=x\(^2\)+mx +2
a, Xac dinh m de f(x) nhan -2 lam 1 nghiem
b, Tim tap hop cac nghiem cua f(x) ung voi gia tri vua tim duoc cua m
Bai 6: Tim da thuc f(X) roi tim nghien cua f(x) biet
\(x^3+2x^2\left(4y-1\right)-4xy^2-9y^3-f\left(x\right)=-5x^3+8x^2y-4xy^2-9y^3\)
Bai2: Cho da thuc f(x)=x\(^2\)+4x-5
a, So -5 co phai la nghiem cua f(x) ko?
bViet tap hop S tat ca cac nghiem cua f(x)
Bai 3; Thu gon roi tim nghiem cua cac da thuc sau
a, f(x)=x(1-2x)+(2x\(^2\)-x+4)
b,g(x)=x(x-5)-x(x+2)+7x
c, h(x)=x(x-1)+1
moi nguoi xin hay giup to
cho 2 da thuc :f(x)=3x^3 - 2x^2 + x + 5
g(x)=3x^2 + ax + b
tim a,b sao cho f(x)=(x-1)*g(x)
moi nguoi giai giup em voi
tim nghiem cua cac da thuc
a,x^2+x
b,x^2+2x+1
c,2x^2+3x-5
d,x^2-4x+3
e,x^2+6x+5
f,3x(12x-4)-9x(4x-3)=30
g,2x(x-1)+x(5-2x)=15
Hihihi.Hi moi nguoi.Minh se dat mot cau hoi ve dai so lop 7,mong moi nguoi chi giai><,boi vi toan minh hoc chua gioi lam nen co cac bai toan con thac mac,len day de mong nhan duoc su giup do,de toan nhu sau:(1)Da thuc P(x)=x2016 +2013x + 2012 co ngiem duong khong?Vi sao?. 2 Bai nua nhe(*^-^*):
(2)Cho hai da thuc: M(x)=2,52 -0,5x-x3-1
1/2N(x)=-x3+2,5x2-6+2x
a)Tim A(x)=M(x)-N(x).Sau do tim mot ngiem cua da thuc A(x)
b)Tim da thucB(x) biet B(x)=M(x)+N(x).Cho biet bac cua da thuc B(x).
(3)Cho da thuc:f(x)=ab2 + bx + c.Chung to neu f(x) co ngiem x=-1 thi b=a+c.
MOT BAI NUA THOI MA.NHA NHA NHA MOI NGUOI^_^:
(4)Cho hai da thuc:A=(-1/2axy3)2 va B=(-3a2 x2)3 (a la hang so khac 0).
a)Tinh M=A.B roi cho biet he so va phan bien cua M
b)Tim bac cua M.
AI CO CAU TRA LOI NHAN TIN TRA LOI CHO MINH BIET NHAAAAA.CAM ON!!!!!.
Cho da thuc f(x)=a.x2+b.x+c Tinh f(1)?
tu do hay tinh tong cac he so cua da thuc g(x) sau khi rut gon:
g(x)=(2021x2022-2022x2021+2)2021.(2022x2021-2021x2022-2)2022
cho cac da thuc f(x)=ax+b va g(x)=bx+a trong do a;b khac 0 biet rang nghiem cua da thuc f(x) la so duong cmr nghiem cua da thuc g(x) cung la 1 so duong
cho cac da thuc F(x) = 4x^2 + 3x - 2
G(x) = 3x^2 - 2x + 5 H(x) = x(5x-2) +3
a) tim x de F(x) + G(x) - H(x) = 0
b) chung to F(x) - 3x + 5 luon duong voi moi x