Question

Let g(x)=x^2+2x-6. Find the value of 2[g(2)]?

Answer 1

If \(g(x) = x^2+2x-6\), what is the value of \(g(2)\)? Replace all the \(x\)'s by 2 and compute the result.

Answer 2

Multiply that by 2 to get the value of 2[g(2)]...

What do you get?

Answer 3

4?

Answer 4

No, I think you meant to type "4!" :-)

Yes, 4 is correct.

Answer 5

Haha thanks :)

Answer 6

Not so hard, right?

Answer 7

Just the 2[] threw me off :p

Answer 8

Here's a slightly trickier one:

let \(f(x) = x+3\) and \(g(x) = x^2-5\)
what is the value of \(g(f(x))\) if \(x = 3\)? Sometime you see this written as \((g\circ f)(x)\)