Can some one pleaseeeee check my answers I want to see if I m right????

Question

anonymous · Answer

Which function is an even function?
(Points : 4)
       f(x) = -x^2

       f(x) = 6x3

       f(x) = -x-2

       f(x) = 2x3 + 2

I think its B

mathmale · Answer

Why not check out the definitions of "even function" and "odd function" so that you can be reasonably sure of your answer?  "I think it's B" sounds like a guess, not a problem solution.

anonymous · Answer

Which is the completely factored form of x6  64y3?
(Points : 4)
       (x^2- 4y)(x^4 + 4x^2y + 16y^2)

       (x^2 + 4y)(x^4- 4x^2y + 16y^2)

       (x^2  -4y)(x^4 -16y^2)

       (x^2 - 4y)^3
I think its B

anonymous · Answer

I did look at the definition but it kid of confused me

mathmale · Answer

What are the characteristics of an EVEN function?

mathmale · Answer

In other words, what are y ou looking for in the set of four possible answers that would tell you which one is an even function?

anonymous · Answer

If f(-x) = f(x)

mathmale · Answer

Right.  Can you explain how to use this criterion for an even function?

anonymous · Answer

No  not really

mathmale · Answer

Look at answer choice #1 for the first problem.

  f(x) = 6x3    should be typed as   f(x) = 6x^3, since that '3' is an exponent.

Starting with   f(x) = 6x^3, throw out that (x) and replace it with f(-x), and throw out that x in 6x^3 and replace it with (-x).  What do you get?  Is your result the same as   f(x) = 6x^3 or different from   f(x) = 6x^3?