UPSC NDA I 2011 Mathematics Paper
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Question : 49 of 120
Marks:
+1,
-0
If A = [
] and B = [
] then which of the following is/are correct?
1.A B is defined
2.B A is defined
3.A B = B A
Select the correct answer using the code given below:
1.
2.
3.
Select the correct answer using the code given below:
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