Given the complex number .
(a) Convert the complex number to its Cartesian form.
(b) Plot the complex number on an Argand diagram.
Practice IB Mathematics Analysis and Approaches (AA) Topic AHL 1.12—complex Numbers – Cartesian Form and Argand Diag with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for AHL 1.12—complex Numbers – Cartesian Form and Argand Diag and mirrors Paper 1, 2, 3 style where relevant.
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Given the complex number .
(a) Convert the complex number to its Cartesian form.
(b) Plot the complex number on an Argand diagram.
(e) Let be the midpoints of the segments respectively. Consider the equation () for which the four points are roots.
The complex number is defined by . Points , and on an Argand diagram represent the complex numbers , and respectively (where denotes the complex conjugate of ).
Consider the complex equation , where . The equation has four distinct roots , which can be written in the form , with and .
(a) Find the values of and , expressing them in polar form.
(b) These roots and form a geometric sequence.
Find the common ratio of the geometric sequence, expressing your answer in Cartesian form.
(c) On an Argand diagram, the roots are represented by points .
Plot the points and on an Argand diagram.
(d) The equation () has the complex conjugates as its roots.
the value of and the value of .
Consider a complex number .
(b) Find the argument of in radians, expressing it to three significant figures.
(c) Write in polar form .
It is given that .
(a) Express in the form .
(b) Find the argument of , giving your answer in radians.
(c) Find the modulus of , giving your answer in the form .
(a) the Argand diagram showing the points , and ,.
(b) the area of triangle .
(a) the modulus of .
Find the least possible value of and the corresponding value of .