Math Problem Statement
Solution
The problem asks to find and plot the roots of the following complex numbers on the complex plane:
- (fifth root of 1)
- (square root of -4)
- (square root of )
- (cube root of )
- (a complex fraction)
Solution Steps:
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Fifth Root of 1: gives 5 roots in total on the unit circle in the complex plane. They are given by for .
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Square Root of -4: is , because , where is the imaginary unit.
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Square Root of : Convert to polar form, and use the formula for the square root in polar coordinates.
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Cube Root of : Convert into polar form, then find its cube roots by dividing the argument by 3.
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Complex Fraction : First, calculate the square root of and then simplify the fraction.
Would you like a detailed explanation for each step, or just the final answers for these roots?
Related Questions:
- How do you convert a complex number into polar form?
- What is De Moivre's theorem and how does it apply to roots of unity?
- How do you find the cube roots of a complex number?
- What is the geometric interpretation of complex roots on the complex plane?
- How do you simplify expressions with complex fractions?
Tip:
When plotting complex numbers, their modulus represents the distance from the origin, and their argument represents the angle from the positive real axis.
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Math Problem Analysis
Mathematical Concepts
Complex Numbers
Roots of Unity
Polar Coordinates
Formulas
Roots of unity: e^(2πik / n) for k = 0, 1, ..., n-1
Square root of complex numbers in polar form: √r * (cos(θ/2) + i sin(θ/2))
Cube root of complex numbers: r^(1/3) * (cos(θ/3) + i sin(θ/3))
Theorems
De Moivre's Theorem: (cos θ + i sin θ)^n = cos(nθ) + i sin(nθ)
Polar Form of Complex Numbers
Suitable Grade Level
Grade 11-12
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