Show that 1+i^10+i^20+i^30 is a real number.
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i¹⁰=-1
i²⁰=1
i³⁰=-1
1+(-1)+1+(-1)=0
0 is a real number,
So, we can say that the value of 1+i¹⁰+i²⁰+i³⁰ is a real number.
PalakGusain:
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