# Relation b/w roots and the coefficients of quadratic equations Quiz Questions and Answers PDF Download eBook p. 154

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## Quiz on Relation b/w roots & the coefficients of quadratic equations PDF Download eBook

MCQ: If a > 0, then the function ƒ(x) = ax² + bx + c has a minimum value at

- x = a/2b
- x = -a/2b
- x = -b/2a
- None of Above

C

MCQ: The period of 3sin(3x) is

- π/3
- π/2
- 2π/3
- π

C

MCQ: If ω is the imaginary cube root of unity, then the quadratic equation with roots -3ω and -3ω² is

- x² + 3x + 9 = 0
- x² - 3x + 9 = 0
- x² - 2x + 4 = 0
- x² + 2x + 4 = 0

B

MCQ: Partial fractions of 1/(x²-4) are equivalent to

- A/(x+2) + B/(x-2)²
- A/(x-2) + B/(x+2)²
- A/(x+2) + B/(x-2)
- None of Above

C

MCQ: If ƒ(x) = √(x² +1, then domain of f is

- [-∞,-1]∪[1,∞]
- [-∞, ∞]
- [-∞,-2]∪[2,∞]
- [-∞,-2]∪[3,∞]

B