## Student asking for help(simple stuff)

on 30 Jan 2013

### Shashank Prasanna (view profile)

How can I do following in matlab?

1)Draw the graph of the function y = tan (x) / x dotted red in the interval (-3.3) with a hundred points

2)Find the roots of polynomials y =-3x^3+4x^2-x+3

3)Solve the system of equations:

x-y+2z=1

x-2y-z=2

3x-y+5z=3

4) Find a graph of the function y= (xe^-x)/1-e^x,,,,,,,,,on intervale(-5.5) with step 00:01

` Any help with this would be highly appreciated, thanks in advance.`

Regards.

## Products

No products are associated with this question.

### Shashank Prasanna (view profile)

on 30 Jan 2013
Edited by Shashank Prasanna

### Shashank Prasanna (view profile)

on 30 Jan 2013

Sounds like an assignment. Please read the getting started guide. And use the doc heavily.

http://www.mathworks.com/help/matlab/getting-started-with-matlab.html?s_tid=doc_12b

3) Do you want to vizualize? what do you want to do when you say find a graphs? Use plot again just to observe.

Hint for 1:

```x = linspace(-3,3,100);
plot(x,tan(x)./x,'r.');
```

avantic

### avantic (view profile)

on 30 Jan 2013

Thanks for your help. This is all I needed ( I know I should google better but w/e now :P ). Regards.

#### Join the 15-year community celebration.

Play games and win prizes!

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi