Welcome to Westonci.ca, the ultimate question and answer platform. Get expert answers to your questions quickly and accurately. Our platform provides a seamless experience for finding reliable answers from a knowledgeable network of professionals. Explore comprehensive solutions to your questions from a wide range of professionals on our user-friendly platform.

Find [tex]$f \circ g, g \circ f$[/tex], and [tex][tex]$g \circ g$[/tex][/tex].

Given:
[tex]f(x)=x+4[/tex]
[tex]g(x)=x-5[/tex]

(a) [tex]f \circ g[/tex]
[tex]\(\square\)[/tex]

(b) [tex]g \circ f[/tex]
[tex]\(\square\)[/tex]

(c) [tex]g \circ g[/tex]
[tex]\(\square\)[/tex]

Sagot :

To find the compositions of the functions [tex]\( f \)[/tex] and [tex]\( g \)[/tex], we will work through each part step-by-step.

Given:
[tex]\[ f(x) = x + 4 \][/tex]
[tex]\[ g(x) = x - 5 \][/tex]

### (a) [tex]\( f \circ g \)[/tex]

To find [tex]\( f \circ g \)[/tex], we need to compute [tex]\( f(g(x)) \)[/tex].

1. Start with the inside function [tex]\( g(x) \)[/tex]:
[tex]\[ g(x) = x - 5 \][/tex]

2. Now substitute [tex]\( g(x) \)[/tex] into [tex]\( f \)[/tex]:
[tex]\[ f(g(x)) = f(x - 5) \][/tex]

3. Apply [tex]\( f(x) \)[/tex] to [tex]\( x - 5 \)[/tex]:
[tex]\[ f(x - 5) = (x - 5) + 4 \][/tex]

4. Simplify the expression:
[tex]\[ f(x - 5) = x - 1 \][/tex]

Thus, [tex]\( f \circ g = f(g(x)) = x - 1 \)[/tex].

### (b) [tex]\( g \circ f \)[/tex]

To find [tex]\( g \circ f \)[/tex], we need to compute [tex]\( g(f(x)) \)[/tex].

1. Start with the inside function [tex]\( f(x) \)[/tex]:
[tex]\[ f(x) = x + 4 \][/tex]

2. Now substitute [tex]\( f(x) \)[/tex] into [tex]\( g \)[/tex]:
[tex]\[ g(f(x)) = g(x + 4) \][/tex]

3. Apply [tex]\( g(x) \)[/tex] to [tex]\( x + 4 \)[/tex]:
[tex]\[ g(x + 4) = (x + 4) - 5 \][/tex]

4. Simplify the expression:
[tex]\[ g(x + 4) = x - 1 \][/tex]

Thus, [tex]\( g \circ f = g(f(x)) = x - 1 \)[/tex].

### (c) [tex]\( g \circ g \)[/tex]

To find [tex]\( g \circ g \)[/tex], we need to compute [tex]\( g(g(x)) \)[/tex].

1. Start with the inside function [tex]\( g(x) \)[/tex]:
[tex]\[ g(x) = x - 5 \][/tex]

2. Now substitute [tex]\( g(x) \)[/tex] into another [tex]\( g \)[/tex]:
[tex]\[ g(g(x)) = g(x - 5) \][/tex]

3. Apply [tex]\( g(x) \)[/tex] to [tex]\( x - 5 \)[/tex]:
[tex]\[ g(x - 5) = (x - 5) - 5 \][/tex]

4. Simplify the expression:
[tex]\[ g(x - 5) = x - 10 \][/tex]

Thus, [tex]\( g \circ g = g(g(x)) = x - 10 \)[/tex].

So the final results are:
(a) [tex]\( f \circ g = x - 1 \)[/tex]
(b) [tex]\( g \circ f = x - 1 \)[/tex]
(c) [tex]\( g \circ g = x - 10 \)[/tex]
Your visit means a lot to us. Don't hesitate to return for more reliable answers to any questions you may have. We hope you found this helpful. Feel free to come back anytime for more accurate answers and updated information. Thank you for choosing Westonci.ca as your information source. We look forward to your next visit.