 Hello and welcome to this session, it is because the following problem today. Let every function from r to r be defined as fx is equal to x to the power 4 to z correct answer. We have option a, f is 1 1 on 2, b, f is 1 1 on 2, c, f is 1 1 but not on 2, d, f is neither 1 1 not on 2. Now let us write the solution. First let us check for 1 1. We find that f of minus 1 is equal to f of 1 but 1 is not equal to minus 1, f of x is equal to x to the power 4 thus f is not 1 1. Now let us check for on 2. f of x assumes only non-negative values so non-negative real number in r that is pre-image in r. x is not 1 1 and x is not on 2. The only relevant option is d that is x is neither 1 1 nor on 2. Therefore the correct answer is I hope you understood the problem. Bye and have a nice day.