设,在D上可积，，则 , , .https://mooc1-1.chaoxing.com/ananas/latex/p/27236https://mooc1-1.chaoxing.com/ananas/latex/p/356004https://mooc1-1.chaoxing.com/ananas/latex/p/1153863https://mooc1-1.chaoxing.com/ananas/latex/p/1153883https://mooc1-1.chaoxing.com/ananas/latex/p/1153941https://mooc1-1.chaoxing.com/ananas/latex/p/1153969https://mooc1-1.chaoxing.com/ananas/latex/p/1153978
举一反三
- 已知=-4+j3，=2.78+j9.20，用计算器计算＝（ ）。/ananas/latex/p/1787/ananas/latex/p/1786https://mooc1-1.chaoxing.com/ananas/latex/p/1787/ananas/latex/p/638451
- 根据定积分的性质，比较积分值的大小，并将括号内填入适当的“＜”或“＞”： ; ; ; ;/ananas/latex/p/987262/ananas/latex/p/987278https://mooc1-1.chaoxing.com/ananas/latex/p/987288/ananas/latex/p/987299/ananas/latex/p/987288/ananas/latex/p/987293/ananas/latex/p/987309/ananas/latex/p/987314
- 一正弦交流电压u=141sin( t+60)V，它的有效值为()。 https://mooc1-1.chaoxing.com/ananas/latex/p/309
- 若随机变量,,则Φ(-1)=,Φ(1)=. /ananas/latex/p/569761/ananas/latex/p/1338074
- 两杆件由两铆钉连接，受力如图，则需校核的挤压应力= 。https://mooc1-1.chaoxing.com/ananas/latex/p/104915