Math Is Fun Forum

hi

im stuck with the exercise beneath. i have to work this out by monday but i need some help, i don't know integration by parts that well if that is what is used to work it out and i don't quite get how can i show it graphically. im hoping someone will cheer me up and solve this with me so i have an example for in the future.

f(t) = 0 for t ∈ [0,3]
f(t) = 3 for t ∈ [-3,0]

Period = 6

"Work out the function and plot 2 periods of the signal, also show it graphically for a series (5 terms)."

The answer of the function should look like : http://www.wolframalpha.com/input/?i=1%2F6+%2A+integral+-3+to+0+of+3%2Aexp%28-i%2Api%2An%2At%2F3%29+dt

thanks for the kind person(s) who are willing to help, it's really a blessing.

kind regards
kim