Just because you can punch buttons on your calculator doesn't mean you understand any of it.Įven this is considered lucky at my school. All i get to use is a standard scientific calculator. I'm surprised the professor even lets you use a Ti89. It isn't that hard to show all of your work. Baz wrote:Sounds like you are taking Calc I. So basically, I can get all the answers and know what's going on, but because I don't have every single line on my paper, I'm doing horrible. I was literally teaching a woman with a PhD, fucking ridiculous.
#Sum calculus made easy ti89 full#
I had to come up with a whole sheet of proofs and she still wouldn't give me full credit because I didn't write on the paper the second derivative (triple in this case), even when everyone knows that a negative sign in front of the highest power determines if you have a max or min function (was cubic, x + x^2 -x^3, gives a max). I even came up with my own method to find answers (inflection points being critical values, where decreasing returns to scale goes into effect) and the dumb bitch thought I was wrong. So I was wondering if anyone has ever heard of anyone buying this program?Įven though I can find all the answers on my calculator already, sometimes I just don't know the middle steps and I get fucking marked down to shit. For example let n = 8 then y = x 8 and differentiating it would give dy/ dx = 8 x 7.Ok, so I'm floundering in my Econ 507 class cause of baby mama drama, too many units (18) and other shit going on in my life. Let y = x n, then we should expect to find that dy/ dx = nx ( n-1). Following out logically our observation, we should conclude that if we want to deal with any higher power,-call it n-we could tackle it in the same way.You would expect that differentiating x 5 would give 5 x 4 or differentiating x 6 would give 6 x 5. Now, when you have once seen this, you might easily conjecture how the others will run. Just look at these results: the operation of differentiating appears to have had the effect of diminishing the power of x by 1 (for example in the last case reducing x 4 to x 3), and at the same time multiplying by a number (the same number in fact which originally appeared as the power).Let us collect the results to see if we can infer any general rule.merely means "a little bit of." Thus dx means a little bit of x or du means a little bit of u.you will find that these little bits or elements may be considered to be indefinitely small.
#Sum calculus made easy ti89 how to#
from even attempting to learn how to calculate, can be abolished once for all by simply stating what is the meaning-in common sense terms-of the two principal symbols that are used in calculating.
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