August 2009
Beginner
256 pages
6h 29m
English
Content preview from The Manga Guide to Calculus
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14 Prologue
P(x) cannot be expressed by a known function, but it is still a function.
If you could find a way to predict P(7), the stock price in July, you could
make a big profit.
Exercise
1. Find an equation that expresses the frequency of z chirps/minute of a
cricket at x°F.
The stock price P of company A in month x in 2009 is
y = P(x)
1 2 3 4 5 6
300
200
100
Month
Yen
fx f(x) g( f(x))g
A composite function
of f and g
The graphs of some functions caot be expreed
bystraight lines or curves with a regular shape.
Combining two or more functions is caed “the
composition of functions.” Combining functions
aows us to expand the range of causality.
1
Let
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