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For real x with -10 le x le 10 define ...

For real x with `-10 le x le 10 ` define `f(x) = int_(-10)^(x) 2^([t]) dt` , where for a real number r we denote by [r] the largest integer less than or equal to r. The number of points of discontinutiy of f in the interval (10,10) is

A

0

B

10

C

18

D

19

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The correct Answer is:
A
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