Question

If n is an odd integer i= √-1 then (1+i)^6n + (1 - i)^6ñ is equal to
1) O
2) 2
3) -2
4) 2i


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Answer 1

Answer:

If lines kx + 3y = k - 3 and

12x + ky = k are coincident lines

K/12 = 3/k = k-3/k

Then,

K/12 = 3/k

k^2 = 36

k = 6, - 6

Therefore value of k = 6, - 6