Pre-Test in General Mathematics

The equation which expresses C, the cost in pesos of x liters of gasoline at ₱50.10 is

• C(x) = 50.10

• C(x) = 50.10x

• x(C) = 50.10

• x(C) = 50.10x

Let f be a function defined by f(x) = 3x - 5. Find f(-2).

• -11

• -1

• 1

• 11

If f(x) = 5x+3 and g(x) = 2x - 1, find (f ○g)(2).

• 14

• 16

• 18

• 20

Solve the equation x-1x+5= 53.

• -16

• -14

• 14

• 16

What is the domain of the rational function fx=2x+1x-2?

• {x ∈ R ∣ x ≠ -2}

• {x ∈ R ∣ x ≠ -12}

• {x ∈ R ∣ x ≠ 12}

• {x ∈ R ∣ x ≠ 2}

Which of the following is true about the graph of fx=x+3x-2?

• The graph of f(x) has x-intercept of 3

• The graph of f(x) contains the point (2,0)

• The vertical asymptotic of the graph f(x) is the line x = -2

• The horizontal asymptotic of the graph f(x) is the line y = 1

How many vertical asymptotes does the function fx= x+2x2-3x+2 have?

• 0

• 1

• 2

• 3

Which of the following is the y-intercept of the graph of the rational function fx=x-1x+2?

• - 12

• -1

• 12

• 2

Which of the following is a one-to-one function?

• Teacher to students

• Student ID to his ID number

• An even number to its factors

• Yes or No questions to answers

Which of the following functions is the inverse of fx=3x-2 given that fx is one-to-one?

• f-1x= x2x-3

• f-1x= x2x+3

• f-1x= 2x-3x

• f-1x= 2x+3x