Area of a curve revolved about x-axis

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SUMMARY

The discussion focuses on calculating the area of a curve defined by the equation y=e^x when revolved around the x-axis. The key method involves using two substitutions: the first substitution is u=e^x, which simplifies the integration process. Following this, an appropriate trigonometric substitution is recommended to complete the integration. This approach leads to the correct evaluation of the area under the curve.

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nweis84
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I'm pretty sure I'm setting this up right i just get stuck when i need to integrate it

the equation is y=e^x and rotated around the x-axis

I've attached the question

can someone help me thanks
 

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You'll need 2 substitutions. The most obvious first substitution would be to let [itex]u=e^x[/itex]. Follow that up with an appropriate trig substitution and you're home free.
 

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