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Brooke2013
Group Title
Let f(x) = x^2 + 6 and g(x) = x+8/x. Find (g times f)(7)
Choices :)
A.) 55/7
B.) 384/7
C.) 295/49
D.) 63/55
 2 years ago
 2 years ago
Brooke2013 Group Title
Let f(x) = x^2 + 6 and g(x) = x+8/x. Find (g times f)(7) Choices :) A.) 55/7 B.) 384/7 C.) 295/49 D.) 63/55
 2 years ago
 2 years ago

This Question is Closed

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
Are you sure it's "times", or is it the open circle? Which tells us that it's a composition of functions :D
 2 years ago

Brooke2013 Group TitleBest ResponseYou've already chosen the best response.0
It's an open circle, I looked at it wrong.
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
dw:1353198866293:dw Ok take a look at this a sec, see if it makes sense or not.. so hmmm to finish this off, we'll need to figure out what f(7) is.
 2 years ago

Brooke2013 Group TitleBest ResponseYou've already chosen the best response.0
How do you figure that out ?
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
\[\large f(x)=x^2 + 6\]\[\huge f(7)=(7)^2+6\]
 2 years ago

Brooke2013 Group TitleBest ResponseYou've already chosen the best response.0
so the answer to f(7) is 55
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
Yah looks good c: So now we plug that value into g!
 2 years ago

Brooke2013 Group TitleBest ResponseYou've already chosen the best response.0
is the answer B, 384/7
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
\[f(7)=55\]\[\huge g(f(7))=\frac{ f(7)+8 }{ f(7) }=\frac{ 55+8 }{ 55 }\]
 2 years ago

Brooke2013 Group TitleBest ResponseYou've already chosen the best response.0
So the answer is D 63/55 :) Thank you so much
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.1
yay team :D
 2 years ago
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