设 是正整数集合，，，则 f 。/ananas/latex/p/63479/ananas/latex/p/2116060/ananas/latex/p/2116061
举一反三
- 设,在内,则在内（ ）/ananas/latex/p/243901/ananas/latex/p/22409/ananas/latex/p/243903/ananas/latex/p/2154/ananas/latex/p/22992
- 已知()=0.4，则()=( )/ananas/latex/p/152/ananas/latex/p/278/ananas/latex/p/847/ananas/latex/p/281/ananas/latex/p/152/ananas/latex/p/4781/ananas/latex/p/7419/ananas/latex/p/6547
- 设在上二阶可导，且,则在内是（ ）/ananas/latex/p/2154/ananas/latex/p/13269/ananas/latex/p/243898/ananas/latex/p/243899/ananas/latex/p/95388
- 设Ω{1,2,…,10},{2,3,4},{3,4,5}，则/ananas/latex/p/1591/ananas/latex/p/37739/ananas/latex/p/37740/ananas/latex/p/502945
- /ananas/latex/p/515893/ananas/latex/p/515894/ananas/latex/p/503271/ananas/latex/p/515901/ananas/latex/p/515902/ananas/latex/p/515907/ananas/latex/p/515908