Răspuns :
f(x)=2x-1
A(a; a+1)
=>
f(a)= 2a-1=a+1
Rezolvam aceasta ecuatie:
2a-1=a+1 <=>2a-a= +1+1 <=>a= 2 =>a=2
A(a; a+1)
=>
f(a)= 2a-1=a+1
Rezolvam aceasta ecuatie:
2a-1=a+1 <=>2a-a= +1+1 <=>a= 2 =>a=2