(1-1/2)X(1-1/3)X(1-1/4).X(1-1/199)=?
5个回答
(1-1/2)X(1-1/3)X(1-1/4).X(1-1/199)
=(1/2)*(2/3)*(3/4)*………………*(198/199)
=1/199
相关问题
1 1 1 1 1 —— + —— +—— + —— + …… + ———— 1x2 2x3 3x4 4x5 199x2
1 1 1 1 1—+ —+ —+ —+...+ ——1X2 2X3 3X4 4X5 199X200
解方程1/(x+1)(x+2)+1/(x+2)(x+3)+...+1/(x+99)(x+100)+1/x+100=199
关于提公因式x1·x2-x1-x2+1=199运用提取公因式法(x1-1)·(x2-1)=199.怎么运用?
用分解因式:199(平方)-1 (平方) 199(平方)+2X 199+1 25(x-1)平方-10(x-1)+1
解方程1/x^2+x+1/x^2+3x+2+1/x^2+5x+6+.+1/x^2+199x+9900=100/x^2+1
计算1/x(x+1).+1/(x+199)(x+200)
X-(1/4+3)-1/3{(X-1/4X+3)}-2-1/2{X-(X-1/4X+3)-1/3(X+1/4X+3)-2
1/1x2=1-1/2;1/2x3=1/2-1/3;1/3x4=1/3-1/4;1/4x5=1/4-1/5;..(1)1
1/x-1+1/(x-1)(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)+1/(x-4)(x-5)