• Support PF! Buy your school textbooks, materials and every day products Here!

Straight Lines!

  • Thread starter xiphoid
  • Start date
  • #1
57
0

Homework Statement


Lines li: ix+(i+1)y+(i+2)=0; i=1,2 intersect at___ point?


Homework Equations


The equation is required at first!


The Attempt at a Solution


I am confused!
How and where should I replace the values of i with 1 or 2?
This is the first step but i am unable to do....
 

Answers and Replies

  • #2
HallsofIvy
Science Advisor
Homework Helper
41,833
955
You are given "ix+(i+1)y+(i+2)=0; i=1,2". You replace those "i"s by 1 and 2!

i= 1: 1x+ (1+1)y+ (1+2)= x+ 2y+ 3= 0
i= 2: 2x+ (2+1)y+ (2+ 2)= 2x+ 3y+ 4= 0
 
  • #3
57
0
Thanks!
You are given "ix+(i+1)y+(i+2)=0; i=1,2". You replace those "i"s by 1 and 2!

i= 1: 1x+ (1+1)y+ (1+2)= x+ 2y+ 3= 0
i= 2: 2x+ (2+1)y+ (2+ 2)= 2x+ 3y+ 4= 0
 
Top