Question

f (x+3)=2x+1 calcule f(5)+f(2)

Answer 1

f(x+3) = 2x+1

f(5)            
f(2+3) ----------> por lo que x=2
f(2+3)=2*2 + 1
f(5)= 5

f(2)
f(-1+3)------------------------> x=-1
f(-1+3)=2*-1 + 1
f(2)=-1