请通俗讲一下集合容斥原理。。。公式都看不懂的说答:=105-1-(34+20+14+9+7)+(7+5+3+3+3+2+2+1+1+1)-(1+1+1)=104-84+28-3=45区间(1,210)内奇素数的集合记为P(1,210),P(1,210)={3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,127,131,137,139,149,151,157,163,...