00:01
Okay, and this problem we're asked to identify what are polynomial functions.
00:07
Now, a couple of these are kind of hard to read, and i'm not sure if there's a copy and error or whatnot, but i can make it really easy for this.
00:15
So an example of a polynomial function could be something like 5x cube plus 7x squared, plus 6x plus 1, or something like that.
00:22
It could be as simple as just 5x, or it could really just be as simple as just a number, like 3.
00:31
All right.
00:31
So all those are examples of polynomials.
00:34
But here's what they don't have.
00:35
So there would be no.
00:37
And no x's in the exponent.
00:45
Okay, so that's number one.
00:47
So you can't have anything like 5 to the x.
00:50
That would be a no -no.
00:51
Okay, you can't have negative exponents.
01:01
So for example, you can't have x to the negative 3.
01:05
All right.
01:07
Now, x to the negative 3 is also 1 over x cubed.
01:09
So that's not allowed either.
01:12
Okay, and then you also have your exponential functions.
01:18
Like if you add e to the power x, that's another one where x is in the exponent.
01:22
That's not allowed.
01:24
You might see, i notice in this one, like e to the x, you have natural log of x.
01:29
Those two kind of go together...