homework help: Math homework help? - Help.com

What’s h(x)?

that’s what i asked myself. .__.

there’s something missing I think

nope, straight out of my textbook.

http://www.mathlinks.ro/Forum/index.p…

fog = 2(g(x))^2 + 4

plug the numbers into x in this case g(x)=x-3

ex
g(1)= 1-3 = -2

F(g(1)) = 2(-2)^2 + 4 = 12

so lets see here…

h(x)= f(g(x))
h(x)= 2(x-3)^2 + 4

the vertex of this function will be @ x = 3, h(x)=4

I agree there seems to be something missing. The reason being the text book should give you 2 numbers not 1. any number can be plugged into x, h(x) >= 4.

are you sure there weren’t more instructions above the problem in your text book?

I think its a case of not understanding the question betta. You might be on to something, like its asking for which numbers are not in the range. Yet he asked which numbers would work which is silly as all numbers work in the domain. How he got imaginary numbers is beyond me.

He could have gotten imaginary numbers by inverting the function so instead of it being y = f(x), it is x = f(y). That would provide a square root, and you put in a value in which the square root is of a negative number…

Whatever the result, you could look at the problem different ways, but there has to be more instructions, but that was a week ago, I wonder what the “answer” was?

anon probably clarified with the math teacher. I bet it was a misreading of the text, or he/she didn’t post the full context of the question.

THat happens too many times here, that’s why I sent him off to the other forum