Plotting and Calculating Integrals

How will I plot and calculate these following integrals using matlab? What is the correct matlab code because it keeps me getting error :(( please help me~

[Torsten]

What is the correct matlab code because it keeps me getting error :((

Then please show your code and the error message you receive.

And what do you mean by "plotting the integrals" ?

Answer 1

[chunyi liu]

syms x

int(2*x^2/sqrt(1+x),x,1,6)

int(cos(2*x)/x,x,1,2)

int(exp(2*x)/x,x,1,2)

int(exp(-x^2),x,-1,1)

Definite integrals are numerical values, not functions.

I'm not sure how you want to draw the plot, if give each value a corresponding independent variable and place them on the graph, you will see that they are four very similar values.

syms x

y1=int(2*x^2/sqrt(1+x),x,1,6)

y2=int(cos(2*x)/x,x,1,2)

y3=int(exp(2*x)/x,x,1,2)

y4=int(exp(-x^2),x,-1,1)

t=1:4;

y=[y1 y2 y3 y4];

plot(t,y1,'*')

axis([1 4 62.2692 62.2693])

[Mark Windel Marquez]

thank you!!!