Consider the following functions.

Algebra
Tutor: None Selected Time limit: 1 Day

f(x) = x2 + 5x,      g(x) = 8x2 − 1

Find (fg)(x).

 
Find the domain of 
(fg)(x).
 (Enter your answer using interval notation.) 
 

Find 
f
g
(x).
 
 

Find the domain of 
f
g
(x).
 (Enter your answer using interval notation.) 
 
Feb 23rd, 2015

f(x) = x2 + 5xg(x) = 8x2 − 1

(fg)(x). = f(8x2-1) = (8x2-1)^2+5(8x2-1) = 64x^4-16x^2+1+40x^2-5 = 64x^4+24x^2-4

(fg)(x). All Real Numbers i.e (-infinity, infinity)


Feb 23rd, 2015

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Feb 23rd, 2015
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Feb 23rd, 2015
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