# Toronto Math Forum

## MAT334--2020F => MAT334--Lectures & Home Assignments => Chapter 1 => Topic started by: Jessica Long on September 22, 2020, 10:44:50 PM

Title: Problems to 1.2 Q20
Post by: Jessica Long on September 22, 2020, 10:44:50 PM
The question: Let z1 and z2 be distinct complex numbers. Show that the locus of points z={tz1+(1−t)z2,−∞<t<∞}, describes the line through z1 and z2. The values $01 give the line segment joining z1 and z2. I have an intuitive understanding of why the locus is a line, as it is similar to the description of a line through two points in R^2. However, I'm not sure how to prove this holds in C. Should I be trying to express it as one of the equations for line in C, such as Re(n̄z) = C or w̄z + wz̄ = r? Title: Re: Problems to 1.2 Q20 Post by: Victor Ivrii on September 23, 2020, 07:58:36 AM You ca refer to the fact that straight lines in$\mathbb{C}$are also straight lines in$\mathbb{R}^2\$ and conversely