Thread: Complex Numbers Problem

Hey

can some one tel me how do i go about solving this question

Let m be a positive fixed interger and l be an integer that is not divisible by m

prove

1 + w^l + w^2l + .... + w^(m-1)l = 0

all the w's have subscript "m".


Thanks

Originally Posted by flaming

1 + w^l + w^2l + .... + w^(m-1)l = 0

I assume that

Then, since .

Now use geometric sum, .