## finding the function? trig problem

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.
mathman12
Posts: 1
Joined: Sat Feb 05, 2011 7:21 pm
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### finding the function? trig problem

find the function :
d) f(-x)
equation : 2x+1/3x-5

second equation:
e) -f(x)
equation : 2x+1/3x-5

I ONLY NEED THE WORK !

snowdrifter
Posts: 18
Joined: Tue Jan 11, 2011 4:52 pm
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### Re: finding the function? trig problem

mathman12 wrote:find the function :
d) f(-x)
equation : 2x+1/3x-5

second equation:
e) -f(x)
equation : 2x+1/3x-5

I ONLY NEED THE WORK !

Your answer to "d" is incorrect: the answer is $\frac {-2x+1} {-3x-5}$
What f(-x) means is wherever you see an "x" in the original equation put (-x) and then simplify.

What -f(x) means is that you muliply the enitre equation by -1 and then simplify: like this $-1(\frac {2x+1} {3x-5})$