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+1 vote
19.7k views
in Sets, Relations and Functions by (27.7k points)
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Find the domain of the function

\(f(x)=\frac{x^2+2x+3}{x^2-5x+6}\)

1 Answer

+2 votes
by (25.8k points)
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Best answer

    f is a rational function 

∴ Domain of f = R – {x : x2 – 5x + 6 = 0} 

i. e., for function to be defined x2 – 5x + 6 ≠ 0 

⇒ x2 - 3x - 2x + 6 ≠ 0 ⇒ x (x – 3) – 2 (x – 3) ≠ 0 

⇒ (x – 3) (x – 2) ≠ 0 

∴ Domain = R – {2, 3}

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