complex numbers and imaginary units
posted by candace .
2i/1+i
your question probably says 'simplify'
multiply top and bottom by (1i)\(1i) and remember that i^2 =1
so...
2i/(1+i) * (1i)\(1i)
= (2i  2i^2)/(1i^2)
= 2(ii^2)/(1+1)
=i+1
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