1X2+2X3X4+3X4X5X6+.+10X11X12X13.X20的末位数是几
3个回答
1X2+2X3X4+3X4X5X6+.+10X11X12X13.X20的末位数
与
1X2+2X3X4=26的末位数相同
末尾数为6
相关问题
30-3(3-X)=4X 3X+12*6=15X+12 4X-2(50-X)=20 12(X-13)=10(X+3) 1
1x2x3+2x3x4+3x4x5+.+10x11x12
(1/2x3x4)+(1/3x4x5)+.+(1/10x11x12)
1x2x3 2x3x4 3x4x5 .10x11x12,怎么算
1X3X5+2X6X10+3X9X15+4X12X20
11(6-x)/3(x-4)=10(5-x)/3(x-4)-5(6-x)/(x-2)
1x2x3x4x5x6x7x8x9x10的个位数是几?
因式分解:X15+X14+X13+X12+X11+X10+X9+X8+X7+X6+X5+X4+X3+X2+X+1
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
4x15/2= 12/5x8= 3/1x4/1= 9/8x10= 6x12/11= 9/2x5/3= 14/6x9/7=