Question

Fie f:R->R, f(x)=4x-3. Sa se rezolve ecuatia f(x)+2*f(1-x)=3.

Answer 1

f(x)=4x-3 atunci f(1-x)=4(1-x)-3=4-4x-3=7-4x  deaoarece am inlocuit x cu 1-x
Inlocuim:
f(x)+2*f(1-x)=3
4x-3+2(7-4x)=3
4x-3+14-8x=3
-4x=-8
x=2