# Tagged Questions

11 views

### Matlab code help with Shooting method to solve differential equations

I have three differential equations which I am trying to solve using shooting method. I am using secant method along with RK4. I have used ODE45 function to solve it. But when I run my code, the code ...
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### P,Q,R at the points (4,2) (2,1) and (6,-3)

PS and QT are altitudes. A) Find the equations of PS and QT answer: PS: y-x-2=0 QT: 5y-2x-1=0 B) Hence find the coordinates of U the point of intersection of PS and QT. answer: (11/3, 5/3) C) ...
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### The function $f(x)$ passes through the point $(-1,6)$ and $f'(x)=3x^2+2x+1$

a) find $f(x)$ I found that to be $f(x) = x^3+x^2+x+7$ b) Prove $f$ has a root between $x=-3$ and $x=-2$ I don't know how to do part b.
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### What are the limitations of modelling a piano sound with the 'play' option of the software Wolfram Mathematica?

'Play' is an input availabe on Wolfram mathematica, which shows how a wave would sound and I am asking myself what the limitations of this input are, in what aspects it does not represent 'real' sound ...
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### Minitab - Binomial Probabilty results in 0 regardless of input constant

This is my first question here so please be patient if I make a mistake. I will try to correct it. I am using minitab for a statistics class. I have to compute the binomial probability with n=60 and ...
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### Fitting a model in R, Least squares estimates

$\Bbb E$(grades) = $\bigg(\alpha$, teacher='Female', and, $\bigg( \alpha+\beta$, teacher='Male' given that I have loaded up the required data, how should I go about fitting this model in R? Then ...
1k views

### Gr. 11 Functions - Limiting domain and range on a graphing calculator

I'm trying to do a homework assignment on my graphing calculator app for my ipad (Quick graph+). (Edit by Willie: The images are originally posted here http://imgur.com/a/XRj4g I've included them ...
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### Intersection of the graphs of two functions

Let $$f(x)={x^3-14x^2+7x+203\over(x-3)(8-x)}$$ I want to find the two solutions of $$f(x)f''(x)=(f'(x))^2,\qquad3\le x\le8$$ This is the first time i am using maple, and i cannot get the graph to ...
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### What is this unary matrix operation called?

I have the folowing problem! $B \cdot \overline{X} = C$ where $B$ is $(12 \times 12)$ matrix and $C$ is $(12 \times 4)$. $X$ is unknown. What does $\overline X$ mean? Also I need to solve this in ...
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### Formula writing tool

Does someone know any online tool that can allow me to write down mathematical expresions such as this one: I have lots of this formulas and little exercices, i would like to write down, to be ...