If and be the roots of the equation x2 − 2x + 2 = 0, then the least value of n for which = 1 is
If and be the roots of the equation x2 − 2x + 2 = 0, then the least value of n for which = 1 is
x2 − 2x + 2 = 0
roots of this equation are
Then
or
So, i
Now, = 1 ⇒ = 1
⇒ n must be a multiple of 4.
minimum value of n = 4