數學與統計
大學
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1
(21) f(x) = -1
x 1'
g(x)
=
1
X
2
22-25 Find the functions (a) fo g, (b) gof, (c) fof, and (d) go g
and their domains.
22. f(x) = x³ + 5, g(x) = √√x
to doang bri batelor
1
23. f(x) =
√x"
25, f(x)=√√√5 - x, g(x)=√x - 10
g(x) = x + 1
y lo dostg 2 zi wOH (s).
24. f(x)
24. f(x) = g(x) = sin x
T,
X
diqsty
sig od ei woH
(d)
12. The manager of a furniture factory finds that it costs $2200 to
manufacture 100 chairs in one day and $4800 to produce
Chollonut
300 chairs in one day.
(a) Express the cost as a function of the number of chairs
produced, assuming that it is linear. Then sketch the graph.
(b) What is the slope of the graph and what does it represent?
(c) What is the y-intercept of the graph and what does it
represent?
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