In November 1781, John Hanson became the first President of the United States in Congress Assembled, under the Articles of Confederation. Many people have argued that John Hanson, and not George Washington, was the first President of the United States, but this is not quite true.
Even and odd mode impedances of a coupled microstrip line. actually I find the reason when you use differential port, the impedance you get is twice the odd mode impedance, whereas if you use common port, the impedance is half the even mode impedance. 1 members found this post helpful.
f(x) = f(âx) for all x. In other words there is symmetry about the y-axis (like a reflection): This is the curve f(x) = x 2 +1. They got called even functions because the functions x 2, x 4, x 6, x 8, etc behave like that, but there are other functions that behave like that too, such as cos(x):hey got called odd because the functions x, x 3, x 5, x 7, etc behave like that, but there are other functions that behave like that, too, such as sin(x) : Sine function: f(x) = sin(x). It is an odd function. But an odd exponent does not always make an odd function, for example x3+1 is not an odd function.