Lyons Luna
11/15/2024 · Middle School
3) Halla el valor de \( a \) para que el número complejo \( z=(2+a i) \cdot(1+i) \) sea: \( \begin{array}{ll}\text { a) Un número real } & \text { b) Un número imaginario puro. }\end{array} \)
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Para que \( z \) sea un número real, \( a = -2 \). Para que \( z \) sea un número imaginario puro, \( a = 2 \).
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