Answers

  • Brainly User
2016-06-18T23:22:52+08:00
It means that the denominator can not have the value of 0, otherwise the rational expression is undefined.

ANSWERS:
1)  Defined on all real numbers (no restriction)
2)  Defined on all real numbers (no restriction)
3)   i\sqrt{5}
4)  6
5)  5/4
6)  7 and -4
7)  9/2

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