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Question
20. If f(x) and g(x) are two functions with all
real numbers as their domains, then
h(x) = f(x) + f(-x)] (g(x) - g(-x)] is :
always an odd function
=
0
(b) an odd function with both f and g are
odd
(c) an odd function whenfis even and g is
Bytiness
(9) always an even function
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