Answer:
A. (0, 4), (4, ∞)
B. (-∞, -4), (4, ∞)
C. (-∞, 0), (0, ∞)
Explanation:
1
p(x) = -------- ; m(x) = x² - 16
√x
a.
p(x)
-------
m(x)
1 1
-------- --------------
√x √x
------------------------------ = ---------------------
x² - 16 (x + 4)(x - 4)
Domain: (0, 4), (4, ∞)
----------------------------------------------------------------------------------------------------------
B.
P(m(x))
1 1 1
------- = ----------------- = ----------------------
√x √(x² - 16) √(x - 4)(x + 4)
Domain: (-∞, -4), (4, ∞)
----------------------------------------------------------------------------------------------------------------------------
C.
M(p(x))
x² - 16
1 1
( ------- )² - 16 = ------- - 16
√x x
Domain: (-∞, 0), (0, ∞)
----------------------------------------------------------------------------------------------------------------------------
I hope this helps!