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If `f(x)` is a periodic function with fundamental period 2 satisfies `f(1+x)+f(1-x)=0; AA|x|<=1 int_(-2n)^(2n)[f(x)]dx` equals (Here [x] is greatest integer of x)
A. |
0 |
B. |
2n |
C. |
-2n |
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D. |
n |