The impedance Z, in ohms, of a circuit element is defined as the ratio of the phasor voltage V, in volts, across the element to the phasor current I, in amperes, through the elements. That is, Z = V I . If the voltage across a circuit element is 18 + i volts and the current through the element is 3 4i amperes, determine the impedance
More on Functions 8/31/2016 By Deryn Susman Piecewise Defined Functions |x| = {x for x ≥ 0}{−x for x < 0} Square Roots Defined: For every strictly positive number a>0, there are two numbers (one positive, one negative) whose square is “a”. The positive one is called the square root of “a” and is denoted by a radical (√ ). ±a This professor does notwantto see . x = {x > 0 (+)(+) =+}{x = o (0)(0) = 0}{x < 0 (−)(−) =+} 2 x ≥ 0 Quadratic Equations **Quadratics have 2 solutions**
