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Question

The set of all points of discontinuity of f(x)=x1x3+6x2+11x+6 is

A
ϕ
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B
{1}
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C
{1, 2, 3}
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D
{1, 2, 3}
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Solution

The correct option is C {1, 2, 3}
f(x)=x1(x+1)(x+2)(x+3)
Discontinuity occurs at the point where the function
f(x) is not defined which is at x=1, 2, 3.

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