10/(50*1/18-10*1/6)=
分子=1*3*5+2*6*10+3*9*15+.+50*150*250分母=2*4*6+4*8*12+6*12*18+.
1,3,6,10,18,24,.
行测 1 2 4 6 10 18()答案是50
求“10:50,6:30,9:18,1:15,5:45”的逆读法.
1*2+2*9+5*6+10*7+20*6+50*1=多少
1/(2*4)+1/(4*6)+1/(6*8)+1/(8*10)+……1/(48*50)=?
10/1*2*3*4+18/3*4*5*6+26/5*6*7*8=
2/1-4/1)+(4/1-6/1)+(6/1-8/1)+(8/1-10/1).+(48/1-50/1)=?/
解方程.10x+1-(10+x)=18
10/21+(3/20+11/21)= 3/18+5/8-2/18= 7/15-1/5= 2/3-1/3+1/6= 1-
10:22,5:30,9:55,10:50,1:30;2:40,3:10,4:58,6:18,7:48,8:15,9:4
(1)10/X+6/(X+10)=1