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[tex] \int{2x} = 2\int{x}[/tex]

Also, what is the integral of 0? Is it 0 or "c"? I'm mainly asking because I recently got dropped with a fourier series homework and its difficult knowing when I can take coefficiants out of the integral and when It's wise to keep them inside, such as when you have Cos (x) c to take c out or keep it in.

Thanks for the help

-Abe