将下列函数f(x)展开为叶级数:(1)f(x)=π/4-x/2(-π 将下列函数 f ( x ) 展开为叶级数:
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【简答题】What is the first way to make your English better? 2. To read as many English books as I can find. 3. What should you listen to and watch? 4. To listen to 1) _______________ and watch some 2) ________...