Plot these curves on the same graph on the where -3<x<3 and -4<y<10. Use your name in the graph's title..... (Please help asap)

I have no idea how to do any of this :( Please help!

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We will be investigating the behavior of functions of the form f(x)=x^3 + ax + 2.

-Plot these curves on the same graph on the where -3<x<3 and -4<y<10. Use your name in the graph's title.

-Where, if at all, is the slope equal to zero for each of the curves? (Calculate using the derivative. Compare your answers to the plot.)

-At each of the points noted in step 2 indicate whether there is a maximum, a minimum or an inflection.

-Is there a value of a for which there are exactly 2 roots? (hint: it's a pretty round value). Plot the curve with this value of a on the same graph as the others.

[Jan]

What kind of help do you expect?

If we solve your homework, you cannot submit it anymore without cheating. Therefore it is recommended to post, what you have done so far and ask a specific Matlab related question. Then the advices from the forum are a allowed assistence.

Btw, "asap" is counterproductive in this forum. At first it is usually associated with "I did not start to work in time". At second answers are always written directly after the question was read - if somebody voluntarily creates an answer, he will not wait some hours before and waste time for searching your question again. Therefore I suggest to remove "..... (Please help asap)" from the title.

[Walter Roberson]

(Actually I do postpone answering some questions according to my convenience and interest. But "asap" does not help me in locating the questions again later.)

[Jan]

No further details for 16 hours. I'm afraid, this is another orphaned homework question.

Answer 1

[Walter Roberson]

To plot multiple curves on the same graph, you can use

plot(x1, y1, x2, y2)

where x1, y1 is the first set of data to graph and x2, y2 is the second set of data to graph.

Titles can be set using the title() call.

Beyond that, you will need to be more specific about what you are asking, keeping in mind that we expect you to know elementary calculus already.

[Jan]

Based on this answer, Konata can still submit the homework without cheating. +1