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by maggiemagnet
Sat May 14, 2016 10:56 pm
Forum: Trigonometry
Topic: Averaging Amplitudes of Different Frequency Bands
Replies: 1
Views: 62

Re: Averaging Amplitudes of Different Frequency Bands

Hello everyone! I am in a pickle right now as I attempt to move forward in my research project on neurofeedback. I am trying to calculate the theta/beta ratio for individual subjects and then compare them statistically. Are you talking about brain waves, like they show here ? The issue I am having ...
by maggiemagnet
Sat May 14, 2016 10:43 pm
Forum: Calculus
Topic: How to prove f(x) = (cx-c*x+x-1)/(2x-x-1), where 1<c<2 is decreasing function?
Replies: 3
Views: 73

Re: How to prove f(x) = (cx-c*x+x-1)/(2x-x-1), where 1<c<2 is decreasing function?

Jinliang wrote:I have plotted the aforementioned function curves of f(x) with different c, and found that it seems to be monotony function. However, it is too hard to me to prove it. May you help me ?

How did they do the proofs in their worked examples? What method are you expected to use? Thank you!
:clap:
by maggiemagnet
Thu Apr 21, 2016 8:52 pm
Forum: Arithmetic
Topic: Million and Billion Conversion
Replies: 1
Views: 377

Re: Million and Billion Conversion

How many zeros does a million and billion have. That depends on the definitions of "million" and "billion" which (I think) vary between countries. Like "billion" in America is "a thousand million" but I'm pretty sure it's something different ("a million ...
by maggiemagnet
Thu Apr 21, 2016 8:46 pm
Forum: Statistics
Topic: Wilcoxon Signed Rank Test
Replies: 1
Views: 247

Re: Wilcoxon Signed Rank Test

rmoyer wrote:Is there a quick and easy way to accomplish this on SPSS 14?

I looked up "SPSS 14" in Google. This is a software package, right? If there are forums that offer help for that package, then maybe they could help you set up the commands (?) correctly there. Good luck!
:clap:
by maggiemagnet
Sat Apr 02, 2016 2:25 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: solving for x given: 4e^-.2x + 3e^-.3x = 5
Replies: 4
Views: 180

Re: solving for x given: 4e^-.2x + 3e^-.3x = 5

how do I solve for x given: 4e^-.2x + 3e^-.3x = .5 This one is at least as bad as your other one! x\, =\, 10 i \, \bigg(2 \pi n\, +\, \pi\, -\, i \log\left[ \, \dfrac{\left(1\,-\, i\, \sqrt{3\,}\right)\, \sqrt[3]{27\,+\,i\, \sqrt{807\,}\,}}{2\, \times\, \sqrt[3]{9\,}}\, +\, \dfrac{4\, \...
by maggiemagnet
Sat Apr 02, 2016 2:15 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: solving for x, given exponentials: 4e^2x + 5e^3x = 15
Replies: 7
Views: 457

Re: solving for x, given exponentials: 4e^2x + 5e^3x = 15

(a^b)(a^c)=(a^(b+c)) so above factoring won't work You're right! I think maybe "FWT" hadn't had his/her caffeine yet when s/he posted that! :v_confused: According to Wolfram's "Alpha" solver, this doesn't solve simply. They give this: x\, =\, i \, \left(2 \pi n\, -\, i \log\...
by maggiemagnet
Fri Mar 25, 2016 1:00 am
Forum: Pre-Algebra
Topic: Simple algebra
Replies: 1
Views: 456

Re: Simple algebra

Is x = x - 1 indeterminate or undefined? What is the definition of "indeterminate"? What is the definition of "undefined"? (I think your book is using what is often called "all solution" and "no solution": try this lesson for comparison.) When you solved the ...
by maggiemagnet
Mon Mar 14, 2016 3:24 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: TI Nspire Calculator Solution Display Question
Replies: 1
Views: 259

Re: TI Nspire Calculator Solution Display Question

I would have thought that your question would be a common one because most schools (so most software that they're using) use the regular format of "(the number) plus or minus (the radical)". But I can't find anything online about changing the format of the display. Sorry. :oops:
by maggiemagnet
Wed Feb 10, 2016 2:34 pm
Forum: Beginning Algebra
Topic: If 5,a,b are multiplied to form the product 5ab then...
Replies: 6
Views: 790

Re: If 5,a,b are multiplied to form the product 5ab then...

i have a simple question here, i was reading hall and knight algebra .there it was said that if 5,a,b are multiplied to form the product 5ab then 5 is called the coeffitient of remaining factors.i here have a question. 5 is a coeff of a or b or ab?what is correct? The coefficient is the number-only...
by maggiemagnet
Mon Jan 04, 2016 12:44 am
Forum: Intermediate Algebra
Topic: Need help finding f(x)
Replies: 1
Views: 827

Re: Need help finding f(x)

how can I find: ((f(x+h) - f(x))/h If f(x) = 1/(square root x) Can someone help me? You can do this like they show here . Work it step by step like they show. What is f(x) for this? What is f(x + h), after simplifying? What is the subtraction, after simplifying? Please show all your work for each p...

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