Math Problem Statement

simplify i^14

Solution

The imaginary unit ii is defined as i=1i = \sqrt{-1}. Powers of ii follow a cyclical pattern every four terms:

i1=i,i2=1,i3=i,i4=1i^1 = i, \quad i^2 = -1, \quad i^3 = -i, \quad i^4 = 1

To simplify i14i^{14}, we use the fact that ini^n repeats every 4 powers, so we find the remainder when 14 is divided by 4:

14÷4=3  remainder  214 \div 4 = 3 \; \text{remainder} \; 2

Thus, i14i2i^{14} \equiv i^2.

From the cycle, i2=1i^2 = -1. Therefore:

i14=1i^{14} = -1

Final Answer:

i14=1i^{14} = -1

Would you like more details or have questions about powers of ii?


5 Related Questions:

  1. How do you simplify i20i^{20}?
  2. What is the general formula for simplifying ini^n?
  3. How is the cycle of powers of ii derived?
  4. Can powers of ii have real values?
  5. How is i0i^0 defined?

1 Tip:

Always reduce powers of ii modulo 4 for quick simplification.

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Math Problem Analysis

Mathematical Concepts

Complex Numbers
Powers of i
Modular Arithmetic

Formulas

i^1 = i, i^2 = -1, i^3 = -i, i^4 = 1 (cycle of powers of i)
i^n = i^(n mod 4)

Theorems

Cyclical nature of powers of the imaginary unit i

Suitable Grade Level

Grades 9-11