Question

determinati imaginea functiei f:{0,1,2,3} -> R, f(x)=x la a doua/x+1

Answer 1

f(0)=0²+1=1
f(1)=1²+1=2
f(2)=2²+1=5
f(3)=3²+1=10
Im f={1.2,5, 10}