Find area under curve and energy of function (matlab)

[asdf12312]

Homework Statement

For the 1st one you wouldn't really need MATLAB I guess to find the area under the curve, it is 0 and so is its energy. For the 2nd one I got A=1.73 and so E=2.99.

Homework Equations

area under curve = evaluate integral from t=t1 to t=t2. in this case t=-2 to t=5 since they are both defined only that far.

energy = area²

The Attempt at a Solution

Used MATLAB and the waveforms for the functions are plotted below. I used trapz() to approximate the integral i.e. to find the area. I could post the MATLAB code but wouldn't think it would be of much use.

 

[tiny-tim]

hi asdf12312!

(what are you asking about?)

for the 2nd one, can't you integrate e^-t ?

 

[asdf12312]

I guess you could lol. Integrating e^-t from t=0 to t=2 and e^(t-4) from t=2 to t=4. so u would get the answer i had listed.. i don't really know what my question was :(