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1. |
Let f : R → R and g : R → R be continuous function. Then the value of the integral \(\int_{ - \pi /2}^{\pi /2} {\left[ {f(x) + f( - x)} \right]} \left[ {g(x) - g( - x)} \right]dx\) is: |
A. | π |
B. | 1 |
C. | -1 |
D. | 0 |
Answer» E. | |