Ta có :
\(f\left(1\right)+f\left(-1\right)=2\)
\(f\left(-1\right)-f\left(1\right)=0\)
\(\Rightarrow f\left(1\right)+f\left(-1\right)-f\left(-1\right)+f\left(1\right)=2-0\)
\(\Rightarrow2f\left(1\right)=2\Rightarrow f\left(1\right)=1\)
cho da thuc f(x)thoa man f(x)+x.f(x)=x+2015 voi moi gia tri cua x.Tinh f(-x)
Cho da thuc f(x) thoa man dieu kien :
x.f (x+1) = ( x+2 ). f(x)
cho da thuc f(x) thoa man
f(x)+2f(2-x)=x+2 tinh f(-1)
Cho da thuc f(x)= ax^2+bx+c bang 0 voi moi gia tri cua x chung minh a=b=c=0
f(x) = 2 (x^3 - x) + x^2 - 3x + 3 - x^3
a) Thu gon hai da thuc tren roi xep theo luy thua giam dan cua bien
b) Tinh f(-1);g (1/2)
c) Tim f(x) + g(x);f(x) - g(x)
d) Tim gia tri cua x de f(x) = g(x) (giup mk voi mk dang can gap)
cho ham so f(x) xac dinh voi moi x
Biet vs moi gia tri tuong ung cua x, ta luon co :f(x)+2f(1/x)=x2.Tinh f(4)
Cho ham so y=f(x) xac dinh voi moi x E R thoa man tinh chat: f(a+b)= f(ab) voi moi a,b E R va f(-3). Tinh f(2014)
Please for kt Toan hoc ky 1
cho da thuc f(x) voi cac he so nguyen thoa man f(3)-f(4)=5. chung minh f(x)-6 khong co nghiem nguyen
cho da thuc f(x)thoa man :
1,f(3)=2
2,f(a.b)=f(a)*f(b)
tinh f(27)
