作业帮若1/2+1/6+1/12+.+1/n[n+1]=19/20,则n=[ ].
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 10:12:42
![若1/2+1/6+1/12+.+1/n[n+1]=19/20,则n=[ ].](/uploads/image/z/12600220-4-0.jpg?t=%E8%8B%A51%2F2%2B1%2F6%2B1%2F12%2B.%2B1%2Fn%5Bn%2B1%5D%3D19%2F20%2C%E5%88%99n%3D%5B++%5D.)
若1/2+1/6+1/12+.+1/n[n+1]=19/20,则n=[ ].
若1/2+1/6+1/12+.+1/n[n+1]=19/20,则n=[ ].
若1/2+1/6+1/12+.+1/n[n+1]=19/20,则n=[ ].
New Document
function test(){
var s = 0;
var n=1;
while(s < 19/20 )
{
s+= 1/(n*(n+1));
++n;
}
log.innerHTML = "n="+ n ;
}
window.onload = test;