观察下列各式,1/1*2=1-1/2 1/2*3=1/2-1/3,1/3*4=1/3-1/4
6个回答
化简成1/(x-1)-1/x+1/(x-2)-1/(x-1)+…+1/(x-10)-1/(x-9)=5/12
1/(x-10)-1/x=5/12
10/(x(x-10))=5/12
x=12
相关问题
观察下列各式(1) 1/1*2+1/2*3+1/3*4=1-1/2+1/2-1/3+1/3-1/4=3/4(2) 1/1
观察下列各式: -1*1/2=-1+1/2,-1/2*1/3=-1/2+1/3,-1/3*1/4=-1/3+1/4
观察下列各式: 1- 1 2 2 = 1 2 × 3 2 ; 1- 1 3 2 = 2 3 × 4 3 ; 1- 1 4
观察下列各式1/1*2=1-1/2,1/2*3=1/2-1/3,1/3*4=1/3-1/4·····计算2/1*2+2/
观察下列各式:1/1×2=1-1/2;1/2×3=1/2-1/3;1/3×4=1/3-1/4,···
观察下列各式:1x2/1=1-2/1;2x3/1=2/1-3/1;3x4/1=3/1-4/1.
观察下列各式然后回答问题:1-1/2^2=1/2*2/3,1-1/3^2+2/3*4/3,1-1/4^2=3/4*5/4
观察下列各式-1+2=-1;-1+2-3+4=2;-1+2-3+4-5+6=3;……那么-1+2-3+4-……-2009
观察下列各式:-1x1/2=-1+1/2 -1/2x1/3=-1/2+1/3 -1/3x1/4=-1/3+1/4 (1)
观察下列各式:[1/1×2]=1-[1/2],[1/2×3]=[1/2]-[1/3],[1/3×4]=[1/3]-[1/