Recent content by shinkansenfan

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    Suppose there are 2 defectives among 5

    suppose there are 2 defectives among 5... suppose there are 2 defectives among 5, test one at a time until you find the 2nd defective, find: 1.you need at most 3 tests 2.given the 2nd defective found at 3rd test, find the p that you find the 1st defective at 1st test. Thanks.
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    Undergrad Suppose there are 2 defective among five items

    Homework help: suppose there are 2 defective among five items, you test one item at a time until you identify the second defective. find: 1. you need at most 3 tests. 2.given the second defective item found at the 3rd test, find the Probability that you found the first defective at the...
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    Undergrad How Do You Integrate (x^3)(e^2x)?

    Thanks very much.
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    Undergrad How Do You Integrate (x^3)(e^2x)?

    How to integrate (x^3)(e^2x) ? Thanks.
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    Graduate What is the derivative of f(t) when integrated with inverse trig functions?

    If f(t)=integral of 1/(1+x^2) from t^2 to 0,then f'(t)=? thanks very much.
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    Graduate Integrating the Exponential Function with a Polynomial Denominator

    thanks!
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    Graduate Integrating the Exponential Function with a Polynomial Denominator

    integrate (e^x)/((3-e^x)^2) thanks very much.
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    Undergrad Integrating x/(x^2+4) Made Simple

    thanks.
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    Undergrad Integrating x/(x^2+4) Made Simple

    how to integrate x/(x^2+4)?