Question

Se dau functiile f,g:{-1,0,1} -> R, f(x)= x^3-x; g(x)=x^5-x^3. Sa se arate ca f=g.

Answer 1

functiile au acelasi domeniu de definitie si acelasi codomeniu, si sunt egale deoarece:
f(-1)=-1+1=0
g(-1)=-1+1=0
f(-1)=g(-1)

f(0)=0
g(0)=0
f(0)=g(0)

f(1)=0
g(1)=0
f(1(=g(1)

Answer 2

f(-1)=-1+1=0
g(-1)=-1+1=0
f(-1)=g(-1)

f(0)=0
g(0)=0
f(0)=g(0)

f(1)=0
g(1)=0
f(1(=g(1)