find the value of

Answers
1 & i^2 will cancel out , because 1 -1 = 0
Similarly, i^4+i^6 will cancel out , because 1+1*(-1) =0
So the net answer should be 0
Answer:
1
Step-by-step explanation:
i^2+i^4=-1+1=0..........[i^2=-1and i^4=1] i^6+i^8 =-1+1=0 i^10+i^12 =-1+1=0 i^14+i^16=-1+1=0 i^18+i^20=-1+1=0 subtuting the value 1+i^2+i^4+i^6.........+i^20
=1+0+0+0+0+0
=1