Reckon: Mathematics

Descripción

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Lyzandra Andrade
Test por Lyzandra Andrade, actualizado hace más de 1 año
Lyzandra Andrade
Creado por Lyzandra Andrade hace alrededor de 8 años
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Resumen del Recurso

Pregunta 1

Pregunta
The two functions f and g defined by f(x) = 3x + 3 for x real and g(t) = 3t + 3 for t real and positive are equal?
Respuesta
  • True
  • False

Pregunta 2

Pregunta
If functions f and g have domains Df and Dg respectively, then the domain of f / g is given by
Respuesta
  • The union of Df and Dg
  • The intersection of Df and Dg
  • The intersection of Df and Dg without the zeros of function g
  • None of the above

Pregunta 3

Pregunta
The graph of f(x) and that of f(x + 2) are the same.
Respuesta
  • True
  • False

Pregunta 4

Pregunta
Let the closed interval [a , b] be the domain of function f. The domain of f(x - 3) is given by
Respuesta
  • the open interval (a , b)
  • the closed interval [a , b]
  • the closed interval [a - 3 , b - 3]
  • the closed interval [a + 3 , b + 3]

Pregunta 5

Pregunta
Let the interval (a , +infinity) be the range of function f. The range of f(x) - 4 is given by
Respuesta
  • the interval (a - 4 , +infinity)
  • the interval (a + 4, +infinity)
  • the interval (a, +infinity)
  • None of the above

Pregunta 6

Pregunta
The equation y = | x | , with y >= 0, represents y as a function of x.
Respuesta
  • True
  • False

Pregunta 7

Pregunta
The equation x = | y | , with x >= 0, represents y as a function of x.
Respuesta
  • True
  • False

Pregunta 8

Pregunta
(x+4)^2+(y−6)^2​​ =48 What is its center?
Respuesta
  • (4,6)
  • (-4,-6)
  • (-4,6)
  • (4,-6)

Pregunta 9

Pregunta
(x+9)^​2+(y−46)^​2​ =123 What is its radius?
Respuesta
  • 11.09
  • 6.78
  • 3
  • 12.34

Pregunta 10

Pregunta
(x−0.5)^​2+(y−3.5)^2=16 The center is (0.5, 3.5)
Respuesta
  • True
  • False

Pregunta 11

Pregunta
Fill in the blanks with the correct answers. center (0,5) r=4 x^2+(y-5)^2=[blank_start]16[blank_end]
Respuesta
  • 16

Pregunta 12

Pregunta
Center(2,-3) r=[blank_start]3[blank_end] (x-2)^2+(y+3)^2=9
Respuesta
  • 3

Pregunta 13

Pregunta
FOCI: The formula in solving a>b is c^2=b^2-a^2
Respuesta
  • True
  • False
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