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Which of the following is equivalent to the complex number 
i^(16) ?
Choose 1 answer:
(A) 1
(B) 
i
(C) -1
(D) 
-i

Which of the following is equivalent to the complex number i16 i^{16} ?\newlineChoose 11 answer:\newline(A) 11\newline(B) i i \newline(C) 1-1\newline(D) i -i

Full solution

Q. Which of the following is equivalent to the complex number i16 i^{16} ?\newlineChoose 11 answer:\newline(A) 11\newline(B) i i \newline(C) 1-1\newline(D) i -i
  1. Understanding powers of i: To solve for i16i^{16}, we need to remember the powers of ii. The powers of ii cycle in a pattern: ii, 1-1, i-i, 11, and then repeat. This is because i2=1i^2 = -1, i3=i2i=ii^3 = i^2 \cdot i = -i, and i4=(i2)2=1i^4 = (i^2)^2 = 1.
  2. Finding the position of i16i^{16}: Since the powers of ii repeat every 44th power, we can divide the exponent by 44 to find where i16i^{16} lands in the cycle. \newline1616 divided by 44 is 44, which means i16i^{16} is (i4)4(i^4)^4.
  3. Simplifying (i4)4(i^4)^4: We know that i4=1i^4 = 1. Therefore, (i4)4=14(i^4)^4 = 1^4.
  4. Calculating 141^4: Calculating 141^4, we get 11, because any non-zero number to the power of 44 is itself.
  5. Final result: i16=1i^{16} = 1: So, i16i^{16} is equivalent to 11.

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