e^x=X怎么解啊?
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e^x=X怎么解啊?e^x=X怎么解啊?e^x=X怎么解啊?(e^x)/xhasnoelementaryderivative--youcantryintegrationbypartsbutyouwon
e^x=X怎么解啊?
e^x=X怎么解啊?
e^x=X怎么解啊?
(e^x)/x has no elementary derivative -- you can try integration by parts but you won't get anywhere.
so mathematicians have made up a special function called the exponential integral, Ei(x), whic...
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(e^x)/x has no elementary derivative -- you can try integration by parts but you won't get anywhere.
so mathematicians have made up a special function called the exponential integral, Ei(x), which is defined as:
Ei(x) = integral, from -infinity to x, of (e^t / t) dt
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