Question

the value of the given sum in image​

Answer 1

Answer:

I think it's x square up I hope it will help u

Answer 2

Here,

${i}^{4n + 2} = {i}^{4n}. {i}^{2} \\ = (1).( - 1) \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: ( {i}^{4n} = 1 \: and \: {i}^{2} = - 1) \\ = - 1$

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