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If f : IR to IR is defined by {:f(...

If `f : IR to IR` is defined by
`{:f(x)={("x - 1,"," for "x le 1),(2-x^(2)","," for "1 lt x le 3 ),("X - 10,"," for "3 lt x lt 5),("2x,"," for " x ge 5):}`
then the set points of discontinuity of f is

A

lR - {1,5}

B

{1,3,5}

C

{1,5}

D

IR - {1,3,5}

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Verified by Experts

The correct Answer is:
C
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