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Mathematics
John Callahan
14 March, 11:21
How to write a function that expresses f (x)
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Yosef Haley
14 March, 12:15
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Lets write
(x) = (1 / 2) f (x) + (1 / 2) f (x) + (1 / 2) f (-x) - (1 / 2) f (-x)
which gives us
= (1 / 2) (f (x) + f (-x)) + (1 / 2) (f (x) - f (-x))
let
g (x) = (1 / 2) (f (x) + f (-x))
check that g (x) is even
g (-x) = (1 / 2) (f (-x) + f (x)) = g (x)
let
h (x) = (1 / 2) (f (x) - f (-x))
check that h (x) is odd
h (-x) = (1 / 2) (f (-x) - f (x)) = - (1 / 2) (f (x) - f (-x)) = - h (x)
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