# Help with functions

Watch
Announcements
Thread starter 4 weeks ago
#1
How do you work out part b?

Im confused because its f^2 (x) so that doesn't mean square the function f(x) so what do I do here?
0
Thread starter 4 weeks ago
#2
(Original post by Hollymae764)
How do you work out part b?

Im confused because its f^2 (x) so that doesn't mean square the function f(x) so what do I do here?
Also for part d i got the answer e^x +5 / 2 = g^-1(x) with the domain being any real number is this correct?
0
4 weeks ago
#3
f^2 (x) is a shorter way of asking for f∘f (x) (or maybe just ff(x); don't remember what it says in the textbook) i.e., the composition of f and f. Also, your answer to d looks good, assuming you really meant (e^x +5) / 2
1
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### Should there be a new university admissions system that ditches predicted grades?

No, I think predicted grades should still be used to make offers (706)
33.91%
Yes, I like the idea of applying to uni after I received my grades (PQA) (890)
42.75%
Yes, I like the idea of receiving offers only after I receive my grades (PQO) (393)
18.88%
I think there is a better option than the ones suggested (let us know in the thread!) (93)
4.47%