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September 15, 2009
Help Pricing Antique Furniture Currently For Sale On eBay
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Help Pricing Antique Furniture

please help on this hard derivative problem?
Certain pieces of antique furniture increased very rapidly in price in the 1970s and 1980s. For example, the value of a particular rocking chair is well approximated by
V = 125(1.5)^t
where V is in dollars and t is the number of years since 1975. Find the rate, in dollars per year, at which the price is increasing.
I need an actual rate for the answer.
V=125 (1.5)^t
dV/dt = 125 (1.5)^t ln (1.5) (this is the derivative)
dv/dt =125 ln(1.5) v^t
Note:
ln (v) = ln (125) + t ln (1.5)
(1/v) dv/dt = ln (1.5)
dv/dt = 1n(1.5) v
= ln (1.5) 125 (1.5)^t
Antique Furniture : How to Become an Auctioneer
Help Pricing Antique Furniture Currently For Sale On eBay.
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Antique Lamp Buyer's Guide: Identifying Late 19th and Early 20th Century American Lighting List Price: $29.95 Sale Price: $27.19 Used From: $19.68 |
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Do you own an old lamp? Are you wondering what it is, how it was originally used, how you can make it better, or how much it is worth? If so, this book is written for you! Easy to read and complete with a newly revised price guide, this book answers many of the basic questions confronting lamp collectors, from "Where do I look for a manufacturer's signature?" to "How do I distinguish reproductions from originals?" Using a combination of color photographs and catalog illustrations, here is a wealth of information for anyone interested in buying or selling old lighting... |
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