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Question

If a<0, b>0, then ab is equal to
  1. |a|b
  2. (|a|b)i
  3. |a|b
  4. none

A
(|a|b)i
B
none
C
|a|b
D
|a|b
Solution
Verified by Toppr

Given that a<0

a>0 and b>0

ab=(1)|a|b

=i|a|b{i2=1}

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