①-1,0,2,6,14,( ),62,126 ②-1,1,5,11,19,(
①-1,0,2,6,14,( ),62,126 ②-1,1,5,11,19,(
找规律(1)-1,0,2,6,14,(),62,126 (2)1,-1/2,-4/1,1/5,(),()
①(-36)-(-28)+(+126)+(-40)-(+58)-(-40)= ②1-2+3-4+5-6+.+99-100
解方程 ①5/11-x=1/5 ②x-7/12=7/18 ③x-7/19=7/19 ④3/14+x=1/2
解不等式组 x+1/3>0① 2(x+5)≥6(x-1)②
求矩阵A=[1 2 3 4 5][0 6 2 4 10][1 11 3 6 16][1 -19 -7 -14 -34]的
①.1/2*5+1/5*8+1/8*11+1/11*14=
已知三组数据①1,2,3,4,5②11,12,13,14,15③3,6,9,12,15.求方差,可用计数器.
①0.2+2/5×(5\6-0.75) ②36×(7/9-1/4+13/18)×6/45 ③0.75×5/6-1/3+0
解方程①(x+3/x-1)²-5(x+3/x-1)+6=0 ②x²-2/x+3-6x+18/x
怎样计算下列各题~①1/2+1/4+1/6+1/31+1/62+1/124+1/248+1/496②1/42+5/42+
-3,-2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,2