Question

I need help ASAP! I will fan and medal anyone who helps me as QUICKLY as possible.
1. Given F(x) = 3x 2 - 4, find F(-√3).
2. Given F(x) = 3x 2 - 4 and F(a) = 8, find a.
3. If F(x) = 2x and G(x) = log x, find F [G(x)].
4. If F(x) = 3 log x and G(x) = x 2 + 1, find G[F(x)].
5. If F(x) = log 5 2x, find F -1(x).
6. Which of the following is a rational zero of the function
P(x) = 4x 4 + 8x 3 - 7x 2 - 21x - 9? A. -3/2 B. -1 C. -3/4

Answer 1

I'm not sure how to help you past the first one

Answer 2

On the first one is it 3x+2-4 or 3x^2 -4?

Answer 3

it's 3x^2

Answer 4

Yeah, Its raised 2.

Answer 5

Oh okay....

Answer 6

I just have no clue how to do any of this :c

Answer 7

For the first question, plug in -sqrt(3) for x.

Answer 8

\[3(-\sqrt{3})^2 - 4 = ?\]

Answer 9

I got the first one, it was close to five, and that was one of my answers so I chose it haha

Answer 10

Oh, for the second question, set the function equal to 8.
8 = 3x^2 - 4
Can you solve for x?

Answer 11

Err, which ones are we doing then lol.

Answer 12

All of them, besides the first one haha

Answer 13

Alright, do the second one then lol. It's ez peazy.

Answer 14

I am dumbbb. I dont know how to get x because of the squared

Answer 15

Can you do something else first? With the 4?

Answer 16

Add it to the 8 so it is 12=3x^2

Answer 17

Good, then, divide right?

Answer 18

by three and get 4=x^2, the square root and get 2?

Answer 19

Not just 2 buttttt

Answer 20

x=2
?

Answer 21

When you square root something, you will get the positive of that, like 2.
But you can also get the negative of that, -2.
(2)^2 = 4
(-2)^2 = 4

Answer 22

The question didn't ask for all values of a, so it's w/e lol

Answer 23

Ohh!!! Okay! That was one of my answers so, next question! :D

Answer 24

f(g(x)) means we're putting the function g(x) into the x's of f(x). :3
Get my drift?

Answer 25

Yes, kinda :P

Answer 26

Let's see if you can do that one then. Show me what you got.

Answer 27

Uhmm, 2logx?

Answer 28

#4 is also the same deal.

Answer 29

Correct :)

Answer 30

okay :D We're on a roll! haha

Answer 31

I think i got the rest of them! Thank you soo much!! you have saved me!!!! <3 <3 <3