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Question

If x[5,3], then the correct option(s) is (are)
  1. x3[125,27]
  2. x4[0,625]
  3. 1x[15,13]
  4. 1x2[125,)


Solution

The correct options are
A x3[125,27]
B x4[0,625]
D 1x2[125,)
Here, x[5,3]
Splitting into intervals
x[5,0)[0,3]
x3[125,0)[0,27]
x3[125,27]

x4(0,625][0,81]
x4[0,625]

1x(,15][13,)

x2[0,25]
1x2[125,)
 

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