30X+(1+2+3+4+……+X)*12=19440 求解答 要求写过程

1x+2x+3x+4x+5x+6x+7x…+99x=100 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 化简:1+x+x(1+x)+x(1+x)^2+x(1+x)^3+……+x(1+x)^2005 x^2+x+1=0,求x^2+x+1+x^3+x^4+……+x^2006 f(x)=x(x-1)(x+2)(x-3)(x+4)……(x+100),求f'(1) 1/(x+1)(x+2) + 1/(x+2)(x+3) + 1/(x+3)(x+4) …… 1/(x+2005)(x+2006)=1/2x+4012 试求|x-1|+|x-2|+|x-3|+|x-4|+……+|x-1999|的最小值 （x^24 x^23 x^22 …… x）÷（x^8+1）×（x^3+x^2-x-1)÷（x-1)÷(x^4+1)求值（x^24+x^23+x^22+……+x+1)÷（x^8+1)×(x^3+x^2-x-1)÷(x-1)÷(x^4+1) 1X+2X+3X…+98X+99X+100X=50500X X等于多少? 计算1/x(x+2)+1/(x+2)(x+4)+…+1/(x+98)(x+100) x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 1-x+x^2-x^3+x^4……-x^2009+x^2010=?1-x+x^2-x^3+x^4……-x^2009+x^2010=? 化简1/(x+1)(x+2)+1/(x+3)(x+4)+……1/(x+2005)(x+2006)=1 x^5-x^4+x^3-x^2+x-1 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 f(x)=1+x-x^2/2+x^3-x^4+…+x^2001/2001,求零点个数 计算：1/(x-1)(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)+……+1/(x-2010)(x-2011) 计算(x+1)(x+2)/1+(x+2)(x+3)/1+(x+3)(x+4)/1+……+(x+2008)(x+2009)/1RT