Răspuns:
Explicație pas cu pas:
11
imaginea functiei f:{-2,1]←R f(x)=x+4
f(-2)=-2 f(1)=5
f:{-2,1}→{-2,5]
13 f para daca f(x)=f(-x)
f(x)=x²-1/(x²+2)=f(-x)=(-x)²-1{(-x)²+2)=x²-1/(x²+2)
14 f impara daca f(x)=-f(-x)
f(x)=x³-1/x³
f(-x)=-x³+1/x³=-(x³-1/x³)=-f(-x)
15
f∅f∅f∅f(1) f(x)=x³-x^4=x³(1-x) f(1)=0
f∅f(x)=(x³-x^4)³-(x³-x^4)^4 f∅f(1)=0
....f∅f∅f∅f(1) =0
