Question: Formula 4 is valid only when f(x) 0. Show that when f(x) is not necessarily positive, the formula for surface area becomes 27| f(x)
![27| f(x) |V1 + [f'(x)]² dx](https://dsd5zvtm8ll6.cloudfront.net/si.question.images/image/images10/786-C-I(817).png)
27| f(x) |V1 + [f'(x)] dx
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In the derivation of 4 we computed a typical contribution to the surface area to ... View full answer
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