If i= -1 , the number of values of i^ n + i^ -n for different n Z is

JEE Advanced Mathematics question

If , the number of values of for different is

Answer: (A)

Powers of repeat with period 4, so check : - : - : (since

Create a free account to read the complete working (2 steps), and practise questions like this in a timed test.

Question ID VK-108041