Define the following functions and determine the domain of the resulting function :


a. (f+g)(x) b.(f-g)(x) c. (f.g)(x) d. (f/g) (x)

1. f (x) = x +5
g (x) = x-8

2 . f (x) = 2x -3
g(x) = x+4

3. f(x) = 3x-1
(x) = 9 -1


1
is that g(x) in the last one? and is it 9x?
yes g(x)
and yes 9x , sorry

Answers

2014-07-13T22:17:35+08:00
1.a.)2x-3
b.)13
c.)x²-3x-40
d.)1 r. \frac{13}{x-8}

2.a.)3x+1
b.)x-7
c.)2x²+5x-3
d.)2 r. \frac{11}{x+4}

3.a.)12x-2
b.)-6x
c)6x7x²-12x+1
d.)3 r. \frac{-24x-2}{9x-1}
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