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Question

Simplify : 3+4i+34i3+4i34i

A
2i
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B
2
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C
2i
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D
2
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Solution

The correct option is C 2i
Given,

3+4i+34i3+4i34i

Now,3+4i=4+4i+i2=(2+i)2=2+i

Similarly, 34i=2i

=2+i+2i2+i(2i)

=42i

=2i=2i

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