Given expression is,
( 1−i )−( −1+i6 )
By simplifying the above expression, we get
( 1−i )−( −1+i6 )=1−i+1−6i =2−7i =2+i( −7 )
Thus, in the form of a+ib , the expression can be written as 2+i( −7 ) .
The value of (i5+i6+i7+i8+i9)(1+i)