Find the value of 1 + i2 +i4+ i6+ i8 + .. + i20 – InterviewSolution

1.	Find the value of 1 + i2 +i4+ i6+ i8 + .. + i20
Answer» 1+2i+4i+6i+.........+20i=1+2i(1+2+3+4+......+10)=1+2i{1011/2)=1+2i55=1+110i{here we USE the SUM of the 1ST nth NUMBERS is N(n+1)/2Here n=10 so sum=10*11/2=55}

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