999 x 998998999 - 998 x 999999998x=乘号要全过程啊····要简算
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999x998998999-998x999999998x=乘号要全过程啊····要简算999x998998999-998x999999998x=乘号要全过程啊····要简算999x998998999-
999 x 998998999 - 998 x 999999998x=乘号要全过程啊····要简算
999 x 998998999 - 998 x 999999998
x=乘号
要全过程啊····
要简算
999 x 998998999 - 998 x 999999998x=乘号要全过程啊····要简算
=999 x (998998998+1) - 998 x (999999999 -1)
=(999 x 998 x 1001001 +999)-(998 x 999 x1001001 -998)
=998 + 999
=1997
1997
1997
999 x 998998999 - 998 x 999999998
=998998999+998*(998998999 - 999999998)
=998998999+998*(-1000999)
=998*1001001+1+998*(-1000999)
=998*(1001001-1000999)+1
=998*2+1
=1997
1997
1996
999 x 998998999 - 998 x 999999998全过程.
101 X 99 X 999 + 999简算,
x(x-1)(x-2)...(x-99)(x-100)
求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X
x-2x+3x-4x+5x.+99x-100x=25求解
(1+x)+x(1+x)+x(1+x)^2+……+x(1+x)^99
计算:99*101*10001+1 204*196 999的2次方-1002*998 解方程:2(x-2)-x的2次方=x-(x-1)(x+1)
999 x 998998999 - 998 x 999999998x=乘号要全过程啊····要简算
x^3+x^2+x=999,x等于多少
2x+x*x=99 求x
(x-1)+x(x+1)=99 = x =
合并同类项x+3x+5x+.+99x
X/2+x/6+X/12+.+x/9900>99
1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+.+1/(x+999)(x+1000)
x(x+1)分之一+(x+1)(x+2)分之一+..+(x+999)(x+1000)分之一
解方程:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
1X+2X+3X…+98X+99X+100X=50500X X等于多少?
1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)=