Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

mfolsom

g(x) = 5x2 - 4x h(x) =√x - 7 Find the domain of: g(h(x))

  • one year ago
  • one year ago

  • This Question is Open
  1. blockcolder
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\text{dom}(g(h(x))=\text{range}(h(x))\cap \text{dom}(g(x))\] In other words, what are the common elements in the range of h and the domain of g?

    • one year ago
  2. imagreencat
    Best Response
    You've already chosen the best response.
    Medals 0

    Well, get the domain of h(x) first. Since x is in the radical sign and we don't want any negative numbers in there for even indices (e.g. 2), the domain of h(x) is x>=0. For g(x), it is actually the set of real numbers, since it is a polynomial. So there isn't any case for g(x). Therefore, the only condition is for x to be >=0. So the domain of h(g(x)) is x>=0.

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.