Question

f:R>>>R,f(x) =-2x+3
a) Daca A(a;-a) apartine Gf, a=?
b) Gf

Answer 1

Salut,

f : |R → |R
f(x) = -2x+3.

a) A(a;-a) € Gf → f(a) = -a
-2a+3 = -a
-a = -3
a = 3. → A(3;-3).

b) Gf n Ox = {B}.
B(x;0) → f(x) = 0.
-2x+3 = 0
-2x = -3
x = 3/2 → B(3/2;0).

Gf n Oy = {C}
C (0;y) → f(0) = y → y = 3. → C(0;3).



Succes!