Composition and inverses of functions

unknownuser
Messages
2
Reaction score
0
just started my precalculus class and i can not understand what's going on and its makes me mad too. In our book we are on 1-2 Composition and Inverses of Functions like for this one problem:

Find [f of g] (x) and [g of f] (x).
1. f(x)= 1/2x-7
g(x)= x=6



and this problem

f(x)=3x^2 and g(x)=x-4 please help
 
Physics news on Phys.org
Stop shouting.
 
And why would you put a thread title "Precalculus" in the "Calculus & Beyond" section instead of in the section called "Precalculus Mathematics"?
 

Thread 'Finding the nth roots of a complex number'

There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
View full post »

Similar threads

Is It Possible to Invert a Homotopy?
Replies
5
Views
969
Prove that f is a homeomorphism iff g is continuous, fg=1 and gf=1
Replies
5
Views
2K
Evaluating scalar products of two functions
Replies
1
Views
1K
Implicit function theorem part 2
Replies
1
Views
1K
Finding inverses of two functions in Lambda Notation
Replies
3
Views
2K
Express a function as a sum of even and odd functions
Replies
7
Views
2K
Can this function still be a constant function?
Replies
11
Views
1K
Lagrange multipliers understanding
Replies
8
Views
2K
f(x) = 2x+1, proving that it is continuous when p = 1 with 𝛿 and ε
Replies
7
Views
1K
Determine limits of integration in double integral change of variables
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top