CBSE Class 11-science Answered
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Asked by | 21 Sep, 2008, 08:05: AM
Expert Answer
we know that i4=1 and i2=-1 and i3 = -i
using these relations
consider (1+i) (1+i3) = (1+i)(1-i) = 1-i2 = 1+1=2
so first two factors are equal to 2
if we consider next two factors (1+i5) (1+i7) = (1+i) (1+i3) = 2
every two factors when multiplied are equal to 2
so 2 multiplied by 2n/2 = n times = 2n
Answered by | 21 Sep, 2008, 12:54: PM
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