Question

The domain of the function f(x)= 1/( X square minus 3X plus Two) is

(a) {1,2}
(b) R
(c) R-{1,2}
(d) R-{1,-2}​

Answer 1

Answer:

d is the correct answer

Answer 2

Answer:

Correct option is

A

(−∞,1]∪[2,∞)

Given function is

f(x)=

x

2

−3x+2

For f(x) to be defined,

x

2

−3x+2≥0

⇒(x−1)(x−2)≥0

⇒x≤1 or x≥2

Hence the domain of f=(−∞,1]∪[2,∞)

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