Are x+x^2 and u+u^2 the same function? If x and u are for all real numbers? A- these are the same function B- If x and u are two different numbers, the functions are different C- there is not enough information to answer this question.

(a) These are the same function

Step-by-step explanation:

Given

and

Required

Are they the same?

Yes, they are the same function and this is proved below.

Represent as a function:

Represent as a function

Let x = u

Substitute u for x in

This implies that:

PS: The information that x and u are real numbers are for all real numbers; So, we can not assume that x and u are different numbers

Hence:

(b) and (c) are wrong

h who knows

step-by-step explanation: