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Apuntes de todo el temario de matemáticas I

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  • August 24, 2022
  • 2
  • 2020/2021
  • Class notes
  • Amalia
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Se recuerda a los alumnos la necesidad de cumplimentar correctamente todos los campos y firmar la plantilla del examen. Los
campos DNI, Nº DE CLASE y TIPO deberán también escribirse con sus cifras en la zona destinada a ello. El incumplimiento




Moebius
de estas normas supondrá la anulación de la prueba cara a la evaluación.


VALOR DE LAS PREGUNTAS: Acierto: +0.77, Fallo: -0.19, Sin contestar: no se penaliza




t
NOMBRE ............................................................................................................................NÚMERO ..............



 
5 5 2
1. Calcular el valor de α para que el determinante de A =  α 3 1  sea la unidad.
−5 −4 −1
a) −3 b) −5 c) 3 d) 1




Universidade
   
1 −1 −1 1
2. La solución de la ecuación A2 X +X = Bt donde A = yB= es:
1 0 2 −1
       
1 −1 1 −1 1 −1 1 −1
a) b) c) d)
1 −3 2 −4 3 −3 2 −3

 
1 −2 3 −4




da Coruña
3. El rango de la matriz  2 1 1 a  es 2 cuando:
1 3 −2 11
a) a = 7 b) a = 9 c) a es negativo d) a = 1

80
4. ¿Cuál de las siguientes funciones es una primitiva de f (x) = ?




t
x(x + 4)
a) 20 (ln |x| − ln |x + 4|) b) 56 (ln |x + 4| − ln |x|)
c) 40 (ln |x| − ln |x + 4|) d ) 20 (ln |x + 4| − ln |x|)

50
5. Una primitiva de f (x) = 2 es:
x + 25
x x
1 x
a) arctan b) 50 arctan c) 10 arctan d ) 50 arctan(5x)




Moebius
10 5 5 5

6. El profesor Hultgren de la universidad de Washington tras un largo estudio sobre
los cobayas de la especie ch-teddy de pelo corto ha llegado a la conclusión de que
la evolución mensual del número de machos (x1 ) y hembras (x2 ) en su hábitat
natural de Venezuela viene dado por la expresión:
 0   
x1 5 4 x1
0 =
x2 4 6 x2

Si en el mes de enero habı́a 200 machos y 100 hembras, ¿cual será el numero de machos y hembras en el
mes de marzo?
a) 14100 machos y 12300 hembras.

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