Question

Exercitiile 3,4,5 urgenttt​

Answer 1

Răspuns:

3. F:R->R, f(x)=2x+4

A(a,3)= 2a+4=3

2a=-1

a=-1/2

B=(-3,-b)= -6+4=-b

-2=-b

b=2

C(2c,-1)= 4c+4=-1

c=-5/4

4.F:R->R, f(x)=ax-7

A(2,-2)=a2-7=-2

a2=5

a=2.5

5.F:R->R,f(x)=3x-2

Sa se determne coordonatele stiind ca x=y

3x-2=y

3(3x-2)=f(x)

9x-6=0

9x=6

x=3/6

A(3/6,0)

9*0-6=-6

B(0,-6)