The value of
 is 2
The value of
 + 1 can be determined by considering the powers of the imaginary unit i 
The powers of i follow a cycle: 
 = i,
 = -1, 
 = -i, and 
 = 1. After
, the powers repeat.
Since(20 is a multiple of 4, we know that 
 will be equivalent to 
, which is 1. 
Therefore, 
 + 1 = 1 + 1 = 2
So, the value of
 is 2