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Saturday
Sep082012

Calculus-Help.com Fund Raiser: Buy a Signed TI-nSpire Calculator to Support the Website

Up for sale is a TI-spire calculator owned and signed by by W. Michael Kelley, the author of The Complete Idiot's Guide to Calculus and The Humongous Book of Calculus Problems. Is Kelley famous? No. Does the signature actually add any monetary value to the auction? No. In fact, like graffiti, it may actually devalue the sale. That's a chance we're willing to take in a fund raiser to reboot Calculus-Help.com for the new school year: http://www.ebay.com/itm/140846256145.

Every day Mike gets a ton of email from people practically begging to buy advertisements on his site. Actual begging. We feel sorry for these people, because what they don't know is that Mike made a (probably very short-sighted) pledge to never sell ads on the site for any reason. "But can't we just throw money at you?" they ask, usually in the form of impersonal spam. "No," Mike says. "I must hold to a promise, a sacred covenant, that I sometimes really regret making." For those of you thinking, "Sure, there's no advertising, but practically every page is an ad for Mike's books. Doesn't that count as advertising?" understand that I am staring at you with a squinty stare, telepathically asking you to kindly put a sock in it, because you're embarrassing me in front of my new friends--friends that could potentially buy the calculator I ruined by signing it with a silver Sharpie.

To help keep the site free, Mike is auctioning off this calculator, which is lightly used, but it contains all the important pieces (like connection cables, the manuals, an alternate TI-84 face plate (let your dork flag fly) and is in incredible shape. It works like a charm, as you can see by the mundane and meaningless calculations I took a picture of. In case you were wondering if this complicated piece of machinery can add, the answer is a resounding YES! (I may or may not have utilized the full power of this guy.)


http://www.ebay.com/itm/140846256145

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Reader Comments (2)

Dear Mr. Kelley,
Am retired graduate Civil Engineer (78 years old now) and decided to review Calculus that I took in the 50's. I got your book "Complete Idiots Gude...Calculus 2nd Edition" from the library and thoroughly enjoying it thus far, though unfamiliar in solving cubic equations.
Am now in Chapter 17 and trying to solve Problem #2, p.191. I can get the answer via u-substitution, while utilizing long division of which I do get 1 + 4/(2x-3), but upon integrating this I don't understand how it becomes x + 2ln(2x-3) + C which is this answer in u-substitution.
I would appreciate your response as your time permits
Geot

October 19, 2012 | Unregistered Commentergeorge j. thiros

my name is Mr Nelson i live in USA i applied for an Xmass loan of 20000usd from a scam pretend to be a loan lender he rip me off the some of 3000usd,i was totally frustrated so a good of my from Australia told me how he was rescued when she was scam by the same loan lenders so he testify to me how she was rescued from a loan lender called Mr.Mark who gave a loan amount of 120000usd and i am now a family of 3 and i am happy today that i now have the money for my Xmas i pray that God will bless him more and more so contact him so that he can also give you loan amount you need for your Xmas here is the email:marksmithloan@outlook.com

December 14, 2013 | Unregistered CommenterMr Nelson

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