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The domain of the function (x^(2) + 8x +...

The domain of the function `(x^(2) + 8x + 9)/(x^(2) - 9x + 20)` is

A

R

B

R - {9}

C

R - {20}

D

R - {4, 5}

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The correct Answer is:
D
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AAKASH INSTITUTE-RELATIONS AND FUNCTIONS -Assignment (Section - A) Objective Type Questions (one option is correct)
  1. Domain of the function defined by f(x) = (x^(2) + 2x +1)/(x^(2) - x - ...

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  2. Domain of the function f given by f(x) = 2-|x-5| is

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  3. The domain of the function (x^(2) + 8x + 9)/(x^(2) - 9x + 20) is

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  4. Range (परिसर) of f(x) = (3)/(2-x^(2)) is

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  5. Range of f(x) = |x-2| is

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  6. Range of f(x) = |x-3| is

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  7. Range [परिसर] of f(x) = (1)/(2x-1) is

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  8. Range of f(x) = x^(3) is

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  9. The possible value(s), the expression (|x-5|)/(x-5) can take is

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  10. If f(x) = 3x + 1 and g(x) = x^(2) - 1, then (f + g) (x) is equal to

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  11. If f(x) = 7x + 9 and g(x) = 7x^(2) - 3, then (f - g)(x) is equal to

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  12. If f(x) is an identity function, then f(5) is equal to

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  13. For a constant function f(x), given that f((1)/(2)) = 1/4. The value o...

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  14. Let f : R → R be a function defined by f ( x ) = 4 x − 3 ∀ x ∈ R . ...

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  15. If f be a function defined as f(x) = p for each x in R, where p is a r...

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  16. If f(x) and g(x) are polynomial functions of x, then domain of (f(x))/...

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  17. The function f(x) = x^(2) - 3x + 7 is an example of

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  18. If f(x) is a signum function, then f(10) is equal to

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  19. For a signum function f(x), the value of f(x) at x = -4 is

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  20. If f(x) is a greatest integer function, then f(-2. 5) is equal to

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