Question

Sa se precizeze monotonia functiilor de gradul 1, f:R-->R, date prin:
a) f(x) = (-5/6)x+1
b)f(x)=(radical din 7x)-1

Answer 1

f(x) = ax +b daca a > 0 monoton crescatoare
daca a <0 monoton descrescatoare
1. a =-5/6 <0 md
2. a=√7 >0 mc
3 a = m +2 daca m+2 >0 , m > -2 mc m∈ (-2 ,∞)
daca m+2<0 , m<-2 md m∈( -∞ , -2)
4. a= - m-1 daca -m-1 >0 m< -1 mc m ∈( -∞ , -1)
daca - m-1<0 , m > -1 md m∈ (-1 ,∞)