1/√X(√X+2)+1/(√X+2)(√X+4)+.+1/(√X+8)(√X+10)=5/24
原式化成1/2[1/√X-1/(√X+2)]+1/2[1/(√X+2)-1/(√X+4)]+.=5/24
所以1/2(1/√X-1/(√X+2)+[1/(√X+2)-1/(√X+4)+.-1/(√X+10)=5/24
1/√X-1/(√X+10)=5/12
X=4
1/√X(√X+2)+1/(√X+2)(√X+4)+.+1/(√X+8)(√X+10)=5/24
原式化成1/2[1/√X-1/(√X+2)]+1/2[1/(√X+2)-1/(√X+4)]+.=5/24
所以1/2(1/√X-1/(√X+2)+[1/(√X+2)-1/(√X+4)+.-1/(√X+10)=5/24
1/√X-1/(√X+10)=5/12
X=4