Question

Let f: R → R be defined as f (x) = 3x. Choose the correct answer.
A. f is one-one onto
B. f is many-one onto
C. f is one-one but not onto
D. f is neither one-one nor onto.

Answer 1

Answer:

No idea about this question sorry

Answer 2

Answer:

f(x) = 3x

ie y = 3x

and x = y/3

for every input there is one and only one out put

and every value of y has one pre image.

hence f is one - one onto