2x4/1+4x6/1+6x8/1.+96x98/1+98x100/1=
问题描述:
2x4/1+4x6/1+6x8/1.+96x98/1+98x100/1=
答
原题=1/2(1/2-1/4+1/4-1/6.+1/98-1/100)=1/2(1/2-1/100)=49/200
2x4/1+4x6/1+6x8/1.+96x98/1+98x100/1=
原题=1/2(1/2-1/4+1/4-1/6.+1/98-1/100)=1/2(1/2-1/100)=49/200