-1000+100×(1+X)^(-1)+ 200×(1+X)^(-2)+ 300×(1+X)^(-3)+ 300×(1+X)^(-4)+ 30

x(x-1)(x-2)...(x-99)(x-100) 已知x=100时f(x)=5,x=1000时f(x)=1,x=10000时f(x)=0.2,求f(x). 1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+.+1/(x+999)(x+1000) x/x+(1-x)/x-1/x 1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)= 1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)+...+1/(x+100)(x+101) 计算1/X(X+1)+1/(X+1)(X+2)+.+1/(X+99)(X+100) 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? 1x+2x+3x+4x+5x+6x+7x…+99x=100 计算:1/(x+3)(x+4)+1/(x+4)(x+5).1/(x+99)(x+100) 计算1/x(x+2)+1/(x+2)(x+4)+…+1/(x+98)(x+100) 设函数f(x)=(x-1)(x-2)...(x-100)(x>100),求F'(X) f(x)=x(x-1)(x-2)…(x-99)(x-100),求f'(100) 已知x^4+x^3+x^3+x^2+x^1+1=0,求x^100+x^99+x^98+x^97+x^96的值 *-----------------------------------------------*| 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 || 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x