I used to know how to do this. I'm majoring in accounting. and now I'm depressed.
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10:42 pm on Dec. 8, 2008 | Joined: July 2008 | Days Active: 267 Join to learn more about SparklingFlowerNorth Carolina, United States | Female | Posts: 1,878 | Points: 4,580
AcidSilence
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well, subsitute. f(x)=3x+5 and g(x)=x squared.
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roflfuckyou
Sustainer Support Leader
(f+g)(x) = x(x^2 + 3x + 5) = x^3 + 3x^2 + 5x
(f over g)(x) = (3x + 5/x^2)x = uhh 3x + 5/x?
not sure on the last one
Post edited at 10:44 pm on Dec. 8, 2008 by roflfuckyou
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Just Waiting Here
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You just plug them in...
f(x) - 3x + 5 g(x) = x^2.
The first one says (f+g)(x) That just means you add the functions together...
(f+g)(x) = f(x) + g(x)
For the second one... it's...
f(x)/g(x). Just plug in the values, and those are your answers.
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well, subsitute. 
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