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17.07.2020 •
Mathematics
1.Un número complejo multiplicado por su conjugado da siempre:
a. (1,0)
b.Un imaginario puro
c.Un número real
d.Un número complejo
2.El conjugado del número complejo -2-5i es:
a. -2
b. 2-5i
c. 2+5i
d. -2+5i
3.El producto de los números complejos 2+3i con 4-5i es:
a. 23 +2i
b. 23-2i
c. -7+22i
d. 7-22i
4.Dados los números complejos Z1: 2+3i Z2: 4-5i ¿Cuál es el cociente entre la conjugada de Z1 con Z2:
a. 23-2i
b. 41 -4i
c. No es posible determinar el resultado
d. 23/41 -(2/41)i
5.Dado que el número imaginario i= √-1 entonces es posible afirmar que i5
a. -i
b. i
c. -1
d. 1
6. siguiente igualdad i17 + i18 =2i es
a. Falsa, porque, i elevado a cualquier núemro es igual a -1
b. Falsa, porque, es imposible que dos potencias imaginarias den el mismo resultado
c. Falsa, porque, el verdadero resultado de i17 + i18 es -i
d. Verdadera, porque, los números complejos también se pueden sumar
7.¿Cuál de las siguientes afirmaciones es verdadera?
a. El conjunto de los números complejos es finito
b. El conjunto de los números resulta de la union de los números reales y los números imaginarios
c. El conjunto de números complejos se encuentra contenido en el conjunto de números reales
d. El conjunto de números Complejos resulta de la union de los números racionales e irracionales
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