The Argand Diagram (Leaving Cert Mathematics): Quizzes

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The Argand Diagram
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What is the Argand diagram used for?

Representing complex numbers visually

What is the horizontal axis called on an Argand diagram?

Real axis (Re)

What is the vertical axis called on an Argand diagram?

Imaginary axis (Im)

A complex number z=a+biz = a + bi is plotted as which point?

(a,b)(a, b)

Where would 3+2i3 + 2i be plotted on the Argand diagram?

(3,2)(3, 2)

Where would −4+2i-4 + 2i be plotted on the Argand diagram?

(−4,2)(-4, 2)

Where would 5−2i5 - 2i be plotted on the Argand diagram?

(5,−2)(5, -2)

Where do real numbers plot on the Argand diagram?

On the real axis (horizontal)

Where would the real number 4 be plotted?

(4,0)(4, 0)

Where do pure imaginary numbers plot on the Argand diagram?

On the imaginary axis (vertical)

What determines the horizontal position of a complex number a+bia + bi?

The real part aa

How should axes be labelled in exam answers for the Argand diagram?

Re and Im

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