Fie functia f:R cu valori in R,f(x)=3x+1-f(1)
a)f(1)=.....
b)f(-2)+f(1)=.....
c)f(x)=.......


Răspuns :

f(x)=3x+1-f(1)
a)f(1)=3×1+1-f(1)
f(1)=3+1-f(1)
f(1)=4-f(1)
f(1)+f(1)=4
2f(1)=4
f(1)=2

f(-2)+f(1)=-7+2=-5
f(x)=3x+1-2
f(x)=3x-1

Sper ca te-am ajutat