Friday, August 30, 2013

BA-20 Profit Manager

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Greetings from Friends Cafè. In Monrovia, CA! My favorite place to hang out on Friday nights. I doubt we see these in office stores anymo...
Wednesday, August 28, 2013

Greetings from San Diego - Calculator Poll Question (Back to School)

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Greetings from San Diego, am on vacation until Labor Day. Specially I am at a Starbucks stop on my way to Encinitas Beach, enjoying a Chai...
Thursday, August 22, 2013

Does √(3*x + 1) = -2 has a solution?

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Solve for x: √(3*x + 1) = -2 One could approach then problem algebraically: (1) Square both sides. (3*x + 1) = (-2)^2 = 4 (2) Subtract 1 ...
Monday, August 19, 2013

Differential Equations #7: Laplace Transforms and Systems of Differential Equations

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In this blog we will look at how Laplace transforms assist us in solving systems of differential equations. In the examples tonight, I have...

Differential Equations #6: Laplace Transforms and Solving Differential Equations

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In the last post, Differential Equations #5 : An intro to Laplace Transforms, we introduced the concept of taking Laplace transforms and i...

Differential Equations #5: An intro to Laplace Transforms

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Laplace transforms is an integral transform that assists is in solving problems in physics, engineering, and differential equations. This...
Thursday, August 15, 2013

Differential Equations #4: Homogeneous Second-Order Differential Equations

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Solving y'' + A*y' + B*y = 0 (A and B are assumed to be real numbers) There are two characteristics for this type of equation:...

Differential Equations #3: General First-Order Linear Differential Equations

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On this installment of the Differential Equation series, we will look at general linear differential equations which takes the form y' ...

Differential Equations #2: Separable Differential Equations

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Separable Equations Here is where we start looking at differential equations that are more complex than y' = f(x). We will look at so...

Differential Equations #1: The Basics

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An Introduction Simply put, a differential equation is an equation that involves an unknown function and it's derivatives. Your goal ...
Monday, August 12, 2013

Completing the Square

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Goal: Transform x^2 + a*x + b to (x + c)^2 + d. Setting the two sides equal to each other: x^2 + a*x + b = (x + c)^2 + d x^2 + a*x + b = x...

The TI-34 Calculator: The Original 1-Line TI-34

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Greetings everyone! Not too long ago I purchased an original-style TI-34 from Amazon; the one with the single line display. I the one purch...
Monday, July 29, 2013

TI-84+ Color Silver Edition: MathPrint versus ClassicPrint

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I have stated that the best way to use programs on the TI-84+ C Silver Edition (and previous editions) that the most efficient way to run ...
Sunday, July 28, 2013

Discounts and Sales Tax: What is the Final Price?

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SALE! GET THIS WONDERFUL ITEM FOR A SUBSTANTIAL DISCOUNT! GOOD FOR THIS WEEKEND ONLY! Chances are that we have all seen this advertisement ...