vaaaaaaaa rogggggggggg punctele c,d
![Vaaaaaaaa Rogggggggggg Punctele Cd class=](https://ro-static.z-dn.net/files/d2d/76c25d4db0ac8dc8334b3e95f9097ecd.jpg)
Răspuns:
Explicație pas cu pas:
c) f(x)=x²+x+1
x1,2=-1±√1-4/2 Δ<0 ecuatia nu are solutii reale
f >o ∀x∈R
d)f(x)=-x²
f≤0 ∀x∈R