SOLUTION: Use (gof)(4), (fog)(4), (fog)(x) and (gof)(x) 1. f(x)=x raised to 2 + 1 abd g(x)=x+5 2. f(x)=x+3 and g(x)=x raised to 2 +x-4 3. f(x)=1 over x and g(x)=2x+3 4. f(x)=x-4 and g(x)

Algebra ->  Rational-functions -> SOLUTION: Use (gof)(4), (fog)(4), (fog)(x) and (gof)(x) 1. f(x)=x raised to 2 + 1 abd g(x)=x+5 2. f(x)=x+3 and g(x)=x raised to 2 +x-4 3. f(x)=1 over x and g(x)=2x+3 4. f(x)=x-4 and g(x)      Log On


   

Question 768304: Use (gof)(4), (fog)(4), (fog)(x) and (gof)(x)
1. f(x)=x raised to 2 + 1 abd g(x)=x+5
2. f(x)=x+3 and g(x)=x raised to 2 +x-4
3. f(x)=1 over x and g(x)=2x+3
4. f(x)=x-4 and g(x)= square root of x+5
5. f(x)=x raised to 2-3 and g(x)=x+2
Answer by solver91311(24713) About Me  (Show Source):
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All you need to do is simplify.

They all work the same way.



Once you have , just replace with 4 wherever it exists and do the arithmetic.

John

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