In a certain region of the country it is known from past experience that the probability
题目
In a certain region of the country it is known from past experience that the probability
of selecting an adult over 40 years of age with cancer is 0.05.If the probability of a
doctor correctly diagnosing a person with cancer as having the disease is 0.78 and the
probability of incorrectly diagnosing a person without cancer as having the disease is
0.06,what is the probability that a person is diagnosed as having cancer?
答案
悬赏太少,没人来的
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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