True or False. The two functions f and g defined by f(x) = 3x + 3 for x real and g(t) = 3t + 3 for t real and positive are equal?

Answer 1

The functions are equal, huh?

Then

3t+3 = 3x+3

3t = 3x <--- subtracts 3

t=x <-- divides both sides by 3

You have just shown that the function is one to one