高科技验证码

给出这个多项式的最小实根

算一下这个式子

求这个微分

这么高科技的验证码是哪个网站在用呢


以下转载自solidot


电脑上的随机数字生成器都是伪随机的,也就是说数字是可预测的。如果你想获得真正的随机数字,现在就登录random.irb.hr吧,
这是一个真随机数字生成服务网站。它由克罗地亚的一组计算机科学家开发,全名是Quantum Random Bit Generator
Service (QRBGS),原理是光子发散过程中产生的无法预测的量子物理效应,网站将免费为学术和科研机构提供真随机数字。

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