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  LiveWire / Teen Forums / School & Homework Connection / Viewing Topic

Need help with Algebra 3-4 problem
Replies: 7Last Post Dec. 8, 2008 10:47pm by Just Waiting Here
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( One Two Step )


Soothsayer
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let f(x)= 3x+5 and g(x)xsquared

how do you do

(f+g)(x)

and


(f over g)(x)



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10:41 pm on Dec. 8, 2008 | Joined: Jan. 2006 | Days Active: 414
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SparklingFlower


Executive
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I used to know how to do this.
I'm majoring in accounting.
and now I'm depressed.

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Then I fell in love with you, and you took that away.. 6.30.09

10:42 pm on Dec. 8, 2008 | Joined: July 2008 | Days Active: 183
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AcidSilence


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well, subsitute.
f(x)=3x+5 and g(x)=x squared.


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10:42 pm on Dec. 8, 2008 | Joined: Nov. 2007 | Days Active: 253
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immaculate



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(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 immaculate

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10:44 pm on Dec. 8, 2008 | Joined: June 2008 | Days Active: 348
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( One Two Step )


Soothsayer
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Quote: from AcidSilence at 10:42 pm on Dec. 8, 2008

well, subsitute.
f(x)=3x+5 and g(x)=x squared.

How can I substitute for only f and g when they give the function of f and g..

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are your parents assholes? cause you are the shit


10:44 pm on Dec. 8, 2008 | Joined: Jan. 2006 | Days Active: 414
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Desertfoxel


Wealthy Hobo
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my brain hurts just by reading the equations

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10:46 pm on Dec. 8, 2008 | Joined: Dec. 2007 | Days Active: 215
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rawrr


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beat me :[

Post edited at 10:47 pm on Dec. 8, 2008 by rawrr

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10:47 pm on Dec. 8, 2008 | Joined: June 2005 | Days Active: 757
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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.


10:47 pm on Dec. 8, 2008 | Joined: Dec. 2007 | Days Active: 425
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